Product Description Adapter for hex bits from square drive to hex drive. Models:1/4" : Base Model: 1/4" square driveConverts to: 1/4" hex driveOther: in line with DIN 3126Manufacturer Number: 23780Contents:1 x Manufacturer: PROXXON S.A. Härebierg 6-10 6868 Wecker Luxembourg office@proxxon.com