ITEM NAME:Impact Driver Drill Bit Bar Socket Adapter Set Hex Shank Steel Ball AdapterSetOZ.1/4 1/4 50mm length ------ 1/4 " shank can be converted to 6.35mm square head. 3/8 1/4 50mm length ------ 1/4 " shank can be converted to 9.53mm square head. 1/2 1/4 50mm length ------ 1/4 " shank can be converted to 12.7mm square head.
