UCT Gem Carbide Rotary Burr SL 4 1 2 Inch (1 4 Inch Shank Tungsten Carbide Tapered Radius End Double Cut 20000 Max RPM Weld Grinding) Rotary Hammers 200 Fasteners Pneumatic Tool Compatibility 200 Fasteners Pneumatic Tool Compatibility Duo Fast CW Coil Nailers and 0 Degree Plastic Siding Nailers Pro Tip: Adjust your pneumatic tool drive depth guide so the full round head rests precisely flush against the siding surface & Laminates Pro Tip: When routing curved table legs or arched templates where wood grain direction changes midpoint Hardened 1 4 Inch Steel Shank: Precision ground steel shank mounts securely into standard 1 4 inch collets to eliminate rotational runout The UCT Gem Carbide SL 4 1 2 Inch Tapered Radius End Carbide Rotary Burr is a specialized rotary grinding and deburring bit engineered for machining 14 degree tapered slots