Easy to use, just insert the conversion shaft into the chuck, then tighten the black and silver pressure plate with wrench. Perfect drill to grinder conversion kit for sanding, wood cutting, jade grinding, furniture polishing, metal rust removing, . This adapter turns your electric drill from a simple punching tool into a multi-functional grinding machine tool. 10mm triangular shaft and 6mm round shaft which can applied to most electric drills for your different work requirements. Made of hard metal, high-temperature resistance, sturdy and , wear resistance., Weight: 0.54564409845 Pounds, Manufacturer: Jaywool