With a hardness of 58 - 62HRC, this crosspoint screwdriver bit is manufactured from high alloy chrome-molybdenum steel for use on hand and power tools. With a 1/4" hex drive, the product is available in varying sizes to suit your needs. Features and Benefits • High alloy chrome-molybdenum steel construction for durability • For use with hand and power tools for versatility • Available in various sizes to suit your requirements Typical Applications • Construction • DIY