The Mayhew Tools 12-pc Torx Socket Bit Set, No. 16013, is designed to provide maximum torque while minimizing damage to the top fastener. The durable socket bits are made from alloy steel with proprietary heat treat to help promote long life and lasting performance. The chrome plated sockets offer corrosion resistance with a design allowing for easy bit replacement. The bits and sockets are made to exacting specifications, providing compatibility with appropriate ratchet, T-handle, or socket spinner handles.