The Stahlwille Series 40TX Sockets for external TORX screws have 1/4in square drives, and are manufactured from HPQ® high performance steel and chrome plated. The sockets have an extremely high load capacity with exceptionally thin rings and walls. Free from cadmium and therefore suitable for use on titanium alloy parts and titanium fasteners, such as those used in the aerospace industry, where safety is crucial. Overall length: 23mm. MADE IN GERMANY.Stahlwille Outside Torx Socket 1/4in Drive E5. Size: 4.7mm.