Full polish nickel chrome plated.-Turn down at base provides grip surface to pull sockets off ratchets. Double line to easily identify SAE sockets. Large hand stamped identification. Surface Drive® technology. Entry angle guides fastener. Serration depth
Size 2-1/8"-3-1/2". Double action (self-centering) contact point ends are made of hardened tool steel and precision ground on a radius of the smallest hole the gauge will enter.