Adapter to Convert Hilti Brand BI + 6 Slot Chuck to 1-1/4"-7 & 5/8"-11 Thread Male Head BI+ 6 Slot to DD-BS 1-1/4"-7 & 5/8"-11 UNC Male Threaded end . Overall Length 120mm Outside thread: 1-1/4"-7 & 5/8"-11 Generic adapter for Hilti brand style BI + 6 Slot end fits DD 110-D, 110-W, 120, 130, 150U, 160 Industrial Grade Adapter only, bit not included 1 set of adapter made for for Hilti Brand Style Bl + 6 Slot to 1-1/4"-7 & 5/8"-11Thread male adapter Specification Hilti brand style BI + 6 Slot end fits DD 110-D, 110-W, 120, 130, 150U, 160 1-1/4" 7 UNC Male Threaded end . Solid all metal construction Convert Hilti Brand BI + 6 Slot Chuck to 1-1/4"-7 & 5/8"-11 Thread Male Head BI+ 6 Slot to DD-BS Overall Length 120mm / 80mm Outside thread: 1-1/4'-7 UNC Inside thread : 1/2" BSP