C.K T4524 Hexagon Screwdriver Bit Set, Grey Screwdriver bits made of S2 steel Made of high quality alloy S2 steel for exceptional hardness and durability. Precision machined tips for accurate fit in screw head and gentle screwing. All sets come with a handy plastic rail for convenient storage Hex 1.5, 2, 2.5, 3, 4, 5, 5.5 & 6mm
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