ITEM NAME:3Pcs 150mm Socket Adapter Set Hex Shank 1/4 3/8 1/2 Inch Impact Driver Drill Bit.1/4" x 1/4" x 150mm--1/4 "shank can be converted into 6.35 mm square. 3/8" x 1/4" x 150mm--1/4 "shank can be converted into 9.53 mm square. 1/2" x 1/4" x 150mm--1/4 "shank can be converted into 12.7 mm square.
