Prestacycle Bicycle Tool Bits - (20) Piece S2 Steel Hex Bit Set QUALITY - Hardened S2 steel 1/4" bits. COMPATIBILITY - Fits Prestaratchet and Prestacycle TorqKeys 4Nm through 12Nm. HEX - 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm TORX - T6, T8, T10, T15, T20,T25, T30 SCREWDRIVERS - PH0, PH1, PH2 1/8 flat, 3/16 flat and 1/4 socket adapter Precision tools in over 20 unique sizes specific for bicycles Hardened steel bits are non-marring on titanium and alloy bolts Perfect for Prestaratchet and most torque wrenches Trim-able bit carrier for a custom tool-set to-go