Wiha crafted Professional Sockets and Ratchets are engineered with premium-quality tool steel for strength and durability with a Chrome-plated satin finish for corrosion protection. Professional Sockets Wiha's Professional Series Sockets are available as 6 point - 1/4" drive, 12 point - 3/8" drive, and 12 point - 1/2" drive configurations and feature roll-stamped die markings for clear identification, a knurled band for extra grip, smooth broached and clear-coated openings for added protection against rust and corrosion, radiused corners for preventing fastener head round-off, and four-side detent grooves with beveled rim for easy and secure drive engagement.