The Mahi Precision Bit Set contains the iFixit 1/4" aluminium bit holder with magnetic bit holder, rounded handle and twist cap, as well as 48 bits. Tensioner, square and spline - this kit offers so much! In addition to the standard Phillips and slotted bits, this kit contains all the 1/4" bit types you need to tackle even the most difficult and twisted fasteners in a home or workshop repair. Technical details Easy to open case with magnetic closure.Easy to open case with magnetic closure Lid with integrated sorting tray 1/4" aluminium bit holder 1/4" screwdriver bits Screwdriver bits Phillips - 0, 1, 2, 3 Slotted - 4, 6, 8 mm Hexagonal Security - 4, 5, 6, 7, 8 mm Hexagonal Security SAE - 1/8, 9/64, 5/32, 3/16, 7/32, 1/4 Pozidriv - PZ1, PZ2, PZ3 Tensioner - 4, 6, 8, 10, 12 Square - 2, 3 Spline - M5, M6, M8 Torx Security - TR10, TR15, TR20, TR25, TR27, TR30, TR35, TR40 Tri-Wing 1, 2, 3, 4 Coupling 1, 2, 3 Schrader Valve 1/4" Screwdriver to 1/4" bit holder Adapter Bit material: 6150 steel Bit holder: Anodised aluminium Housing: ABS Foam: EVAHousing: ABS Foam: EVAC.