The Extra Hard set, 43-piece contains all the standard bits and sockets you need for all your screwdriving applications. The screwdriver bits are made of heat-treated modified S2 steel for hardness and wear resistance. They are colour-coded, making it easier to choose the bit you need. The set is housed in a robust Pick and Click cassette that allows you to build your own toolbox and store your bits neatly and protected.
All bits in the set have a 1/4-inch hex shank for use with three-claw drill chucks and hex drill/screwdriver holders