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Updated: 18 Apr 2026

10 Best Electrical Boxes Knock-out

#1 Best Pick
Rattleware Knock Box for Home, Cafe, Restaurant, Hotel, Office, or Commercial Establishment - Heavy Duty Knock Box Trusted by Baristas Worldwide - Stainless Steel 7.5" x 7" x 4"

Rattleware Knock Box for Home, Cafe, Restaurant, Hotel, Office, or Commercial Establishment - Heavy Duty Knock Box Trusted by Baristas Worldwide - Stainless Steel 7.5" x 7" x 4"

Brand: Rattleware
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  • This is a heavy duty knock box set for espresso coffee grounds designed for baristas who have high expectations from their equipment. Buy the industry standard and get a genuine Rattleware knock box.
  • We've designed this to be a high performance espresso puck knock box and the all-stainless construction emphasizes durability. It includes a heavy duty stainless steel shield, an essential piece for keeping your espresso bar clean.
  • Made with a welded knock box bar for added strength, this espresso grounds knock box will provide years of service in high volume settings.
  • Rugged and well-engineered, hardwearing rubber protects the portafilter. This espresso knock out box is efficient and enjoyable to use. It pairs perfectly with any espresso machine.
  • Made by Rattleware, the gold standard for quality coffee preparation and professional cafe operations. Our tools meet rigorous food service requirements for durability and cleanliness. Using Rattleware products can help companies develop their coffee or espresso program, so baristas can create the best product possible..WE AIM FOR HAPPY CUSTOMER EXPERIENCE - Our Rattleware products meet rigorous food service requirements for durability and cleanliness.
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#2 Best Value
Evecad 8 Packs 4" Square Electrical Box, Ten 1/2" and Six 3/4" Knockouts Metal Electrical Box, 2-1/8" Deep Electrical Junction Box, 30.3 Cu. in. Capacity, Galvanized

Evecad 8 Packs 4" Square Electrical Box, Ten 1/2" and Six 3/4" Knockouts Metal Electrical Box, 2-1/8" Deep Electrical Junction Box, 30.3 Cu. in. Capacity, Galvanized

Brand: Evecad
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  • 1. [Size]: Length & Width: 4 inches; Depth: 2-1/8 inches; Capacity: 30.3 cubic inches.
  • 2. [Knockouts]: Designed for a variety of uses, this square electrical box has ten 1/2-inch knockouts and six 3/4-inch knockouts.
  • 3. [High Quality]: The electrical box is made of galvanized iron to ensure durability and effectively prevent rust.
  • 4. [Widely Used]: This 4" square electrical box is used to enclose wire connections, outlets or switches.
  • 5. [Package Included]: 4" Square Electrical Box * 8. If you have any problem, please contact us through Amazon, we will reply you within 24 hours.
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#3 Budget Pick
Evecad 12 Packs 4" Square Electrical Box, Ten 1/2" and Six 3/4" Knockouts Metal Electrical Box, 1-1/2" Deep Electrical Junction Box, 21.0 Cu. in. Capacity, Galvanized

Evecad 12 Packs 4" Square Electrical Box, Ten 1/2" and Six 3/4" Knockouts Metal Electrical Box, 1-1/2" Deep Electrical Junction Box, 21.0 Cu. in. Capacity, Galvanized

Brand: Evecad
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  • 1. [Size]: Length & Width: 4 inches; Depth: 1-1/2 inches; Capacity: 21.0 cubic inches. The trade size of the box is 2-gang, and a single toggle switch cover can only accommodate 1-gang.
  • 2. [Knockouts]: Designed for a variety of uses, this square electrical box has ten 1/2-inch knockouts and six 3/4-inch knockouts.
  • 3. [High Quality]: The electrical box is made of galvanized iron to ensure durability and effectively prevent rust.
  • 4. [Widely Used]: This 4" square electrical box is used to enclose wire connections, outlets or switches.
  • 5. [Package Included]: 4" Square Electrical Box * 12. If you have any problem, please contact us through Amazon, we will reply you within 24 hours.
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#4 Top Choice
QWORK Electrical Box 12-Pack, 4x2 Inch Outlet Box,13 Cubic Inches, Ten 1/2 Inch Knockouts Electrical Box,1-7/8" Deep, Galvanized Steel

QWORK Electrical Box 12-Pack, 4x2 Inch Outlet Box,13 Cubic Inches, Ten 1/2 Inch Knockouts Electrical Box,1-7/8" Deep, Galvanized Steel

Brand: QWORK
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  • Robust Construction: Crafted from 1/16'' thick pre-galvanized steel, ensuring durability and long-term reliability for electrical connections.
  • Versatile and Functional: Features a 13 cubic inch capacity and 1-7/8 inch depth, providing ample space for housing electrical wire connections, receptacles, or switches.
  • Multiple Knockouts: Designed with ten 1/2'' knockouts (six on the side, two on the end, and two on the top/bottom) for flexible installation and easy access to wiring.
  • Fire Safety Compliant: Suitable for use in exposed work environments and approved for installation in 2-hour fire rated walls, ensuring safety and compliance.
  • Package List: Available in a 12-pack, offering convenience and value for electrical projects, with user-friendly features like a raised ground for seamless installations.
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#5 Popular Choice
ABS Coffee Grind Knock Box, Espresso Coffee Knock Box for Barista, Shock-Absorbent Durable Coffee Espresso Knock Box Dump Bin Grind Waste Bin with Removable Detachable Knock Bar and Non-Slip Base

ABS Coffee Grind Knock Box, Espresso Coffee Knock Box for Barista, Shock-Absorbent Durable Coffee Espresso Knock Box Dump Bin Grind Waste Bin with Removable Detachable Knock Bar and Non-Slip Base

Brand: Aymorder
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  • 【Good Quality】Made of premium ABS material, green environmental protection, non toxic and harmless. We also sell Silicone Espresso Tamping Mats, 2 pieces for only 14.49 with great quality, you can find it on our store or you can search directly ASIN : B0BWT9LX9Q
  • 【Detachable Knock Bar】Made of aluminum, covered in rubber.The rubber design has a very good buffering performance,can reduce the noise and protect the handle of coffee machine,and the removable design make it easy to clean.
  • 【Large Capacity】This coffee knock box has large capacity and you don't have to empty it frequently.
  • 【Space Saving】It is strong and sturdy, and tucks away on the drip tray of your espresso machine for space-saving storage.
  • 【Mutli Uses】Despite the daily use at home kitchen, the knock box can be used in cafe shop and bar. You can take it on for camping as well.
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#6 Top Pick
Breville, the Knock Box 20, Black Truffle, BEA502BTR

Breville, the Knock Box 20, Black Truffle, BEA502BTR

Brand: Breville
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  • The Breville Knock Box 20 is the perfect match for your espresso machine. Strike the portafilter against the knock bar for quick, easy and mess-free disposal of the coffee puck
  • PREMIUM DESIGN: Incorporating our Luxe design, the new-look knock box will perfectly complement the Breville range of espresso machines
  • EASY TO CLEAN & EMPTY: The Knock Box 20 incorporates a removable knock bar, allowing easy cleaning of the inner vessel
  • EASY STORAGE: Compact design lets you neatly store on the drip tray when not in use
  • LARGE PUCK CAPACITY: Conveniently store up to 20 espresso pucks, for quick and easy disposal
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#7 Top Pick
Qlvily 12 Pack 4x2 Inch Metal Electrical Box, Single Gang Electrical Box, Ten 1/2 Inch Knockouts, Raised Ground, 13 Cu. in. Capacity, 1-7/8" Deep, Junction Box Metal, Galvanized Steel

Qlvily 12 Pack 4x2 Inch Metal Electrical Box, Single Gang Electrical Box, Ten 1/2 Inch Knockouts, Raised Ground, 13 Cu. in. Capacity, 1-7/8" Deep, Junction Box Metal, Galvanized Steel

Brand: Qlvily
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  • 🎛️ 【Knockouts】: This electrical outlet box is designed for multiple purposes with ten 1/2 inch knockouts and six side knockouts (two end knockouts & 2 top/bottom knockouts).
  • 🎛️ 【High Quality】: This electric box is made of high-quality material to ensure durability, effectively prevent rusting.
  • 🎛️ 【Dimension】: 4" x 2"; depth: 1-7/8". The capacity of this utility size electrical box is 13 cubic inches.
  • 🎛️ 【Application】: This outlet box is designed to enclose electrical wire connections, outlets or switches. Manufactured using the drawn method, this electrical box is also ideal for exposed work applications.
  • 🎛️ 【Package Include】: 12 * 4x2 Inch Metal Electrical Box. If you have any problem, please contact us through email on Amazon without hesitation, we will reply you within 24 hours.
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#8 Top Pick
(Pack of Box and Cover) 4x2 Inch Utility Electrical Box, Outlet Box, 1/2" Knockout Cover, Drawn Construction, Ten 1/2 Inch Knockouts, Raised Ground, 1-7/8" Deep, 13 Cu. in. Capacity, Galvanized Steel

(Pack of Box and Cover) 4x2 Inch Utility Electrical Box, Outlet Box, 1/2" Knockout Cover, Drawn Construction, Ten 1/2 Inch Knockouts, Raised Ground, 1-7/8" Deep, 13 Cu. in. Capacity, Galvanized Steel

Brand: Airmont Products
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  • COMBINATION PACK – This listing includes one 4x2” utility size electrical junction box and one 4x2” utility size cover with a half inch knockout in it.
  • BOX – This Utility size electric box is designed to enclose electrical wire connections, receptacles, or switches. Constructed using the drawn method, this box is also ideal for exposed work applications. COVER – This listing includes a 2x4” utility size handy box 1/2'' knockout cover. Great for use when an additional knockout is needed in the connection.
  • MATERIAL – Crafted from 1/16-inch pre-galvanized steel, the electrical box and its cover are manufactured using premium quality material to ensure durability. Acceptable for use in 2-hour fire rated walls.
  • KNOCKOUTS – Designed for versatile usage, this electrical outlet box, also known as a handy box, has ten ½” knockouts. (There are six side knockouts, two end knockouts, and 2 top/bottom knockouts.)
  • SPECIFICATIONS – This drawn utility electrical box has a capacity of 13 cubic inches. It is 4x2 inch rectangle and has a depth of 1-7/8 inches. The trade size of this box is 1-gang. Also includes a raised ground.
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#9 Top Pick
Breville, the Knock Box 10, Sea Salt, BEA501SST

Breville, the Knock Box 10, Sea Salt, BEA501SST

Brand: Breville
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  • The Breville Knock Box 10 is the perfect match for your espresso machine. Strike the portafilter against the knock bar for quick, easy and mess-free disposal of the coffee puck
  • PREMIUM DESIGN: Incorporating our Luxe design, the new-look knock box will perfectly complement the Breville range of espresso machines
  • EASY TO CLEAN & EMPTY: The Knock Box 10 incorporates a removable knock bar, allowing easy cleaning of the inner vessel
  • EASY STORAGE: Compact design lets you neatly store on the drip tray when not in use
  • LARGE PUCK CAPACITY: Conveniently store up to 10 espresso pucks, for quick and easy disposal
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#10 Top Pick
Qlvily 12 Packs Octagon Electrical Box, Raised Ground 1-1/2'' Deep Metal Electrical Box, 3/4" Side Knockouts, Electrical Junction Box, Galvanized

Qlvily 12 Packs Octagon Electrical Box, Raised Ground 1-1/2'' Deep Metal Electrical Box, 3/4" Side Knockouts, Electrical Junction Box, Galvanized

Brand: Qlvily
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  • 🎛️ Knockouts: This electrical box is designed for multiple purposes with five 1/2 inch knockouts and four 3/4 inch knockouts.
  • 🎛️ High Quality: This electric box is made of high-quality material to ensure durability, effectively prevent rusting.
  • 🎛️ Dimension: It is 3.6 inches long and 1-1/2 inches deep.
  • 🎛️ Application: This octagon box is designed to enclose wire connections, sockets, or switches. Ideal choice for exposing working applications.
  • 🎛️ Package Include: 12 * Octagon Electrical Box. If you have any problem, please contact us through email on Amazon without hesitation, we will reply you within 24 hours.
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