Suited primarily for repair and servicing on electronic, electrical and mechanical equipment, these Tamperproof Torx or TX screwdriver bits are manufactured from a high alloy chrome molybdenum steel and have a hardness of 58 - 62HRC. Suitable for use on hand and power tools. Features and Benefits Manufactured from a high alloy chrome molybdenum steel Can be used with both hand and power tools making it a truly versatile product Available in a range of sizes to suit your requirements Tamperproof design ensures a positive fit and reduces the likelihood of the bits being interfered with Typical Applications Engineering Construction Automotive DIY