Gedore Individual Sockets Bits 611723 - Gedore 6227020, Gedore manufactures the D 20 3/8AF 6227020 socket wrench bit, featuring a 3/8 inch drive and a 1/4 inch (6.3 mm) size. It is durable and designed for precise applications in professional settings. This bit is typically used for fastening and loosening screws and bolts in mechanical and engineering tasks. Gedore 6227020 Socket 1/4" UD-Profile 3/8"