10 Best Die Grinders Variable-speed

LE LEMATEC Right Angle Die Grinder with Adjustable Head - High-Speed 20,000 RPM Pneumatic Die Grinder for Automotive Detailing, Grinding, Deburring & Polishing - Flexible Head

Exclusive Flexible Head: This 90 degree die grinder offers unmatched reach in tight spaces, perfect for grinding task.
High-Speed Power: The air die grinder delivers 20,000 RPM, ideal for weld prep and sanding with die grinder tools.
Precise Control: Features a 1/4 die grinder collet and NPT inlet, fitting most pneumatic grinder sets with ease.
Compact & Lightweight: At 1.4 lbs, this mini die grinder reduces fatigue for extended use.
Clean Workspace: Rear exhaust on this air angle grinder keeps debris away from your workspace.Built to Last: Rugged pneumatic die grinder designed for durability and compatible with all die grinders.Metalwork Ready: Ideal for grinding and polishing with variable speed die grinder.Automotive Friendly: Great tool for porting, sanding, and polishing.Versatile Use: Perfect for deburring, rust removal, and shaping with this compact die grinder.

DEWALT built brushless motor for efficient performance and runtime of the die grinder
The electric die grinder has up to 25,000 RPM with variable speed trigger
Illuminate dark work areas with LEDs at the nose of the DEWALT die grinder
Multiple handle grasping options with dual-position rocker switch

50% more power compared to previous model - most powerful 12V die grinder on the market and outperforming the pneumatic products
Maximum control for any material, 4-step speed mode & variable speed trigger ideal for working with stainless steel, carbide burrs & accessories up to 76 mm
Compact size (only 119 mm long) to help fit in tight places, and offers great mobility and access
Spindle lock - increased productivity by reducing the need of 2 wrenches
Universal reception to fit both, 6 and 8 mm accessories

Suitable for grinding, deburring and shaping of metal parts, wood components, rubber tires, casting surfaces.
steel movement,very in use.
Fast speed, smooth running and wear .
High no-load rotation speed of it reaches 2000rpm.
Adjustable chuck size range from 3.18~6.35mm,very practical in use.

PREMIUM MATERIAL: The sanding pen is made of alloy shell, which is tight and sturdy; the surfaceprocess treatment is not easy torust, and the workmanship is more delicate and comfortable to hold.
MULTI BEARING DESIGN: Equipped with multiple bearings inside, strong stability, low air consumption, strong motor power, fast speed, high efficiency.
ERGONOMIC DESIGN: This pencil grinder is a lightweight grinder, designed for pen type, it can be held with one hand, its ergonomic design, provides additional comfort and long usage.
SPEED SWITCH: Pneumatic pencil grinder with speed switch, rotate to adjust the speed freely; comes with two disassembly wrenches, easy to disassemble and replace the grinding head.
EASY TO STORE: All parts with pencil grinder can be stored in a small portable box with hook, which is convenient for you to carry out with.

KATSU FIT-BAT Cordless Tools Range they all take the same battery, works on both 18V or 21V, compatible with LXT range, use your current or easy to find on amazon (compatible with BL1850 BL1860B BL1855 BL1840 BL1830 LXT-400 BL1820B BL1815).
With brushless motor, the battery lasts almost twice longer than normal brushed motors, in addition it is maintenance free.
Features with 4 variable speeds up to 24000rpm for different application.
Compact barrel grip, allows comfortable long time use for all types of jobs.
Supplied with 6mm and 6.35mm chuck collets, but WITHOUT Battary and Charger.

It delivers maximum power for heavy duty applications
Features powerstate brushless motor technology
Provides the user with up to 03 HP performance, best-in-class size to help fit in tight places
It features 4-Mode speed control and responsive variable-speed trigger giving unmatched control
Providing best-in-class size, power and performance on the convenience of a compact battery platform