The color-coded screwdriver bits are made from heat-treated S2 steel, making them particularly hard and wear-resistant. The Extra Hard Set, consisting of 50 pieces, includes all the standard bits you need for screwdriving tasks. The screwdriver bits are made from heat-treated, S2-modified steel for added hardness and durability. They are color-coded to help you easily find the right bit. The set is housed in a sturdy Pick and Click case, allowing you to assemble your own toolbox and keep your bits well-organized and protected. It includes a magnetic screwdriver handle that securely holds the bits, along with a bit holder, so you can complete your tasks with ease.