Features FOR 404 CHAINS These sharpening stone bits are mainly used with a hand cranked chain sharpener and are suitable for grinding and polishing large 404 chainsaw chains. Diamond Abrasive :This sharpener bits are made of diamond abrasive, which has high hardness and wear resistance, ensuring good polishing and fine grinding. Convenient Use These diamond chainsaw sharpener bits are compact and lightweight, easy to install and allow polishing and grinding without removing the chain. Applications These diamond milling tools are widely used for grinding and polishing workpieces such as jade stone, ceramics, glass, hard alloys, etc., and have a wide range of applications. Specifications Includes 5 pieces of sanding bits, standard M5 thread size, easy to install and replace, equipped with nuts and wrenches to ensure convenient operation. Specification: Item Type:Chainsaw Sharpening Stone Bit Material: Diamond Blade diameter: approx. 5.5 mm / 0.22 inches. Blade length: approx. 17 mm / 0.67 inches. Handle diameter: approx. 6 mm / 0.24 inches. Thread diameter: M5 Total length: approx. 48 mm / 1.9 inches. Applicable saw chain: large oil chainsaw 404 chain Package list: 5 x whetstone bits. 2 x nuts. 1 x wrench Package List 5 x Sharpening Stone Bits 2 x Nuts 1 x Wrench