With ergonomic handles and high-strength, heat treated bits, the Lutz Multi-Bit Screwdriver Collection is a perfect addition to any toolbox All Lutz Bits are long-lasting, made of chrome vanadium 6150 steel alloy and are heat treated to a Rockwell of 58 to 60 In addition, they are sprayed with an oil mist to avoid rust Available in a variety of colors, the Lutz 6-in-One Screwdriver is a long-lasting, quality product