The SE Sharpening Burr for 3/16” Chainsaw Blades - DB316CS lasts longer than traditional sharpeners. It comes in a convenient plastic storage tube. This sharpening burr leaves a sharp cutting edge on chainsaws. It is handy to have on hand and is a great addition to your tools. SE Intellectual Property Rights Notice: Important: Avoid getting counterfeit items. Genuine SE products come with the SE logo on the packaging. SE is a registered trademark protected by US Trademark Law.