• 1/4" hex drive DIN 3126 and ISO 1173, style C 6.3 • For slotted, Phillips, Pozidriv, TORX®, hexagonal head screws • Includes 31 pieces: 29 bits + 1 magnetic quick release bit holder + 1 socket adaptor • For universal use • High performance alloy steel • Sand blasting + antirust oil • In cardboard box • 1/4" square socket adaptor, ball type for regular nut driver socket (style C 6.3) • Magnetic quick release bit holder with lock in type system (style E 6.3) • Robust and tough bits • Small and compact plastic case with belt clip