1. Weight: 37 grams or so 2. Size: The largest outer diameter is about 54 mm 3. Function introduction: It is installed on the interface of 18mm diameter and 1.5mm pitch to fix the drill bit, milling cutter and other tools. It is equipped with the tool of electric grinder and has the screw pattern on it. It can directly rotate the electric grinder on the holder. Then it plays a role. 4. How to use: Remove the electric grinder cap, install the speaker cover, and adjust the required height. 5. Package includes: 1 positioner + 6 milling cutters
