- Dynabrade’s Wrenchless Pencil Grinder combines precision deburring, engraving and finishing with an exciting new feature: a convenient lever for changing your accessory in seconds! A true time-saver for high production workplaces such as jewelry manufacturers, tool & die shops, aerospace industries and more.
- High-efficiency turbine-driven air motor has no wearable gears, vanes or blades. Oil-free operation minimizes maintenance time and repair costs. Air motor controlled by patented governor, providing constant tool speed under load. Tool housing has non-slip rubber grip for additional control. Tactile cues on shaft end alert operator to rotating collet area. Quality high-speed bearings ensure consistent, reliable operation. 1/8″ and 3/32″ Collets are interchangeable within each model.
- Accepts variety of accessories; Powers carbide burrs and mounted points, sold separately. Quick-Change Lever; Turn lever outward 90 degrees to open collet insert and easily replace accessory.
- Rapid-Stop Brake; Built-in brake stops tool motorwithin one second. Built-In Swivel; Provides 360 degrees of maneuverability for air line. High-Quality Air Line; 1/4″ (6 mm) in dia. and 6 feet (1.82 m) in length.
- One-Touch Operation; Handy switch allows simple on/off operation.

Insize 4121-41N, AMERICAN STANDARD THREAD RING GAGE, NO GO, 4-40UNC, 6928640359170
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