PREMIUM QUALITY. This 1/4 inch (6.3 mm) socket is made with tough, high-grade steel with a polished chrome finish to prevent rusting and it is built to last even when used in tough conditions. ANTI-SLIP. It is designed with an anti-slip drive profile that permits high transmission of forces to the flats of nuts and bolts without damaging them, making your work easier. APPLICATION. STAHLWILLE sockets are extremely resilient but thin-walled and gentle on fastener heads, ideal for working in confined spaces and precision application. RESILIENT. Stahlwille High-Performance Quality Sockets are corrosion resistant and heat treated to ensure durability and serviceability to meet your needs. MADE IN GERMANY. Manufactured under the most stringent quality control conditions and adheres to ASME B 107.1, Fed. Spec. GGG-W-641, SAE AS 954-E (test loads) specifications.