Wiha crafted Professional Series Sockets and Ratchets are engineered with Wiha premium-quality tool steel for strength and durability with a Chrome-plated satin finish for corrosion protection. Wiha's Professional Series Sockets are available as 6 point - 1/4 inch drive, 12 point - 3/8 inch drive, and 12 point - 1/2 inch 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. Wiha's Professional Series Ratchets feature a classic 72-tooth ratchet system with 5° arc swing for smooth ratcheting in tight spaces, highly dependable pawl mechanism for slip and skip prevention, a spring-loaded detent retaining ball for secure socket lock, and a push button quick release for rapid socket exchange. Wiha's Professional Series Extensions are available in 3.0, 6.0, and 10.0 inch OAL and feature roll-stamped die markings for clear identification, a knurled band for extra grip, a beveled drive end for smooth socket engagement, broached and clear coated openings for protection against rust and corrosion, radiused interior drive corners for reduced stress concentrations, and a spring-loaded detent retaining ball for secure socket lock.