With a hardness of 58 - 62HRC and a high alloy chrome molybdenum steel construction, these screwdriver bits are suited for use on hand and power tools. With a TX tip and a 1/4 hex drive. Features and Benefits • Manufactured from chrome molybdenum steel for durability • Available in a variety of sizes to suit your requirements • For use with both hand and power tools for durability • TX tips reduce slippage and provide optimum torque Typical Applications • Construction • DIY • Electrical