The torque adapter has a universal 1/4" hex shank in one end to connect to the handle and a 1/4" hex slot in the other end to connect to the bit. It is 1 1/2" in length and 1/2" in diameter. The life cycle is 20,000 operations and the accuracy tolerance is +-10%. These torque adapters are magnetized and color coded. Sloky has extended this product line by eight custom size adapters and are packaged three (3) pcs in a plastic case.