Vermont American® Cylinder Shaped Rotary Rasp is designed for rasping or filing wood. Made from special alloy steel which is hardened and tempered for long life and increased durability. 1/4" shank fits all drills. Precision cutting edges will not clog or load up. Thickness: 5/8" Useable Length: 1-1/8" Shank: 1/4" Shap