7 Piece SetSet Includes: 4 - 5/16" Insert Bits (#2 And #3 Phillips, 5/16" And 3/8" Slotted), Socket Adapter, Knurled Driver And Metal CaseReversibleUse To Loosen Rusted Or Frozen Screws, Nuts Or Bolts Or To Tighten Screws And BoltsSimple Blow From A Mallet Or Hammer Is All That Is Needed To Activate Driver