About this item： The 6X Valve Lapping Attachment Tool for Drill is a valve grinding kit that includes a valve lapper kit. It is designed to be used with a drill and helps in the process of valve lapping. Valve lapping is a technique used to create a proper seal between the valve and its seat in an engine cylinder head. This attachment tool allows you to attach the valve grinding kit to a drill, making the valve lapping process more efficient and convenient. It typically comes with various sizes of lapping cups or grinding compounds that are used to grind and polish the valve and its seat. .