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Adaptor from square to hexagonal. Comes with quick-release chuck for rapid bit change. Suitable for the attachment of bits with ¼" hexagon drive as per DIN ISO 1173-C 6.3.Drive: ¼" square. Features and Benefits • 1/4" adaptor with quick-release chuck • Suitable for bits with 1/4" hexagon drive (Wera connecting series 1) • Equipped with ball stop groove • 1/4" square socket drive Contents 784 A 1/4" Adaptor with quick-release chuck, 1/4" x 30 mm