Stahlwille Series 45 Bi-Hexagon sockets have 3/8in square drives. They are manufactured from HPQ® high performance steel and chrome plated. The sockets have an extremely high load capacity with exceptionally thin rings and walls. They are 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. The sockets are equipped with anti-slip drives to permit high transmission of forces to the lands of the nits and bolts without damaging them. Manufactured to DIN 3124/ISO 2725-1, ASME B 107.5M, E DIN 3709. MADE IN GERMANY.Stahlwille Bi-Hexagon Socket 3/8in Drive. Size: 12mm.Overall length: 28mm.