uxcell SDS Plus Shank Electric Drill Chuck Adapter 1/2 Inch Thread Dia 2pcs Product Name : Drill Chuck Adapter;For : 12.4mm Drill Chuck Shank Size : 4.5 x 1 x 1.7cm/1.8" x 0.4" x 0.6" (L*Shank Dia* Max.D);Thread Size : 12.4mm x 15mm/1/2"(1/4PT)x 0.59"(D*L) Total Length : 6.5cm/2.56";Color : Gray Material : Metal;Net Weight : 77g Package Content : 2 x Drill Chuck Adapter