The Matco Tools 12-pc Hand Impact Driver Set, No. SID12PBA, features a reversible 3/8" square drive impact driver with a heavy duty hexagon grip that helps prevent the impact driver from slipping out of the user's hand. This set includes an impact driver, bit holder and 10 S2 impact bits: T30, T40, T45, T47, T50, T55, P2, P3, P4 and 9/32 slotted.