ITEM NAME:Pro 0.5-3.2mm Multi Keyless Chuck Bit Grinder Drill Rotary Power Tool 0.5-3.2mm Multi Keyless Chuck Faster Bit Swap for Grinder Drill Rotary Tool SPECIFICATIONS.(0.5-3.2mm Multi Keyless Chuck Faster Bit Swap for Grinder Drill Rotary Tool. Suitable: fit for rotary tool with 7mm spindle. Keyless Chuck x 1. 1) This multi chuck allows you to quickly and easily change accessories on your rotary tool without using collets.