uxcell SDS Plus Shank 12mm Dia Male Drill Chuck Adapter Connector Product Name : Drill Chuck Adapter;Thread Diameter : 12mm/1/2" Shank Diameter : 10mm/2/5";Hex Size : 17mm/0.7" Mount : 1/2 x 20UNF;Total Length : 82mm/ 3.2" Color : Gray;Material : Metal Weight : 42g;Package Content : 1 x Drill Chuck Adapter