Product Summary This Security Bit Set comes with a large assortment of bits for security screws. This is an ideal set for those working on electronic devices that contain tamper proof screws. The set comes in a convenient storage case to keep all of your bits organized and easy to transport. Features Length: 7.5" Construction: Cr-V Steel Packaging type: Air Blown Storage Case Precision sandblasted 6150 Cr-V Steel Universal 1/4" quick release hex shank Extender: 2-1/2" long magnetic Star: T8, T10, T15, T20, T25, T27, T30, T35, T40 Security Star: T10, T15, T20, T25, T30 Hex: 4mm, 5mm, 6mm Security Hex: 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm Slotted: 4mm, 5mm, 6mm Spline: M5, M6, M8 Tri-point / Y-type: TP1, TP2, TP3, TP4 Clutch: 1, 2, 3 Torque: 6mm, 8mm, 10mm Square: #1, #2 Phillips: PH1, PH2 Pozidrive: PZ1, PZ2 Spanner: #4, #6, #8, #10