Features 1、Impact Resistance: The high speed steel grinding head has high hardness, high wear resistance, high heat resistance and impact resistance, so you don't have to worry about it being damaged 2、Easily Screwed To Rotating Tool: Sharpening attachment can be easily screwed to your rotating tool, replacing the tool shell 3、Easily Sharpen Chains: Sharpener can be easily screwed to an electric grinder, and can easily sharpen chains and serrated blades 4、Chain Saw Sharpening Attachments: Used for chain saw sharpening attachments, the bottom thread style of the sharpening attachment is female, with the size of 17mm 5、Equipped With Tools: Equipped with polishing tools and head ruler, which is more efficient to use Specification Item Type: Chainsaw Sharpening Attachment Material: High speed steel + ABS Purpose: Chain saw sharpening accessory Color: Silver + black Sharpening Attachment Bottom Thread Style: Female Sharpening Attachment Thread Size: Approx. 17mm / 0.7in Package List 1 x Sharpening Attachment 3 x Polishing Tool 1 x Ruler 1 x User Manual