Wera 780B/2S Extra Strong 3/8" Square Drive to 5/16" Hex Screwdriver Bit Holder

The Wera 780B/2S is a 3/8" square drive to 5/16" hex screwdriver bit holder, designed to adapt standard 3/8" square drive tools for use with 5/16" hexagon shank bits conforming to DIN ISO 1173-C 8. Built to Wera's connecting series 2 specification, this adaptor is ideal for contractors and tradespeople who need to use screwdriver bits with a ratchet or torque wrench equipped with a 3/8" square drive. The ball stop groove provides a secure, positive retention of drive tools during use. The extra-strong retaining ring is a notable feature, offering a more robust hold than standard adaptors — particularly useful in demanding site conditions where security and reliability matter. Features and Benefits: • Converts 3/8" square drive to 5/16" hex bit drive • Compatible with bits conforming to DIN ISO 1173-C 8 (Wera connecting series 2) • Extra-strong retaining ring for a secure, positive fit • Equipped with ball stop groove for reliable tool retention • Compact 30mm length for use in confined spaces Contents: 780 B 3/8" Adaptor, 780 B/2-S x 5/16" x 30mm Specifications: Drive: 3/8" square socket Bit Drive: 5/16" hexagon Length: 30mm Standard: DIN ISO 1173-C 8