Re-Sharpens the Cutters: This chainsaw sharpening kit restores a sharp new cutting edge to the blade cutters, with no need to remove the chain from the saw. Maintains Depth Guides: This kit includes a Depth Gauge and Flat File to maintain the right cutter-to-depth-guide height. Essential for correct chain saw operation. Universal Fit: Sharpens nearly all makes and models (of this pitch) including Black & Decker, Bosch, Champion, Husqvarna, McCulloch, Partner, Makita, Mountfield, Hitachi, Performance Power, Poulain, Remington, Ryobi, Sovereign, Stihl and most other makes. Less Effort: A sharp chainsaw is easier to use, doesn't drag, gives a cleaner cut, and is safer to use. Domestic Sizes: Sharpens most domestic chainsaws 4.0mm (5/32”) in size with a pitch of 1/4”, and also 3/8” (0.375”pitch) mini/low profile.