IIT 80470 Chain Saw Sharpening Kit Hones and sharpens individual teeth for smooth and efficient cutting power Easy-to-use kit to put like-new edge on worn chainsaws;fits most power rotary tools with 1/8 collet Includes bit guide for perfect edge-angels, shim kit and collet wrench Includes aluminum oxide bits in 4-sizes, 2 grits for micro-grinding hardened steel and carbide steel