For slotted, Phillips and hexagonal head screws.Includes 14 pieces: 12 bits, 1 hand operated impact driver and 1 bit holding adaptor.SL5, SL6, SL8, SL10, PH1, PH2, PH3, PH4, H4, H5, H6, H8.To loosening jammed screws or nuts without the use of power tools.Robust and tough bits.High performance alloy steel.Zinc phosphate finish.Impact driver for 5/16” bits.½” adaptor for bits 5/16” hexagon drive.5/16" hexagon drive. DIN 3126, ISO 1173, style C8.In plastic box