Gedore Individual Sockets Bits 611721 - Gedore 6166130, The Gedore 20 9 6166130 is a 9 mm socket wrench bit compatible with 1/4" (6.3 mm) tools. Manufactured by Gedore, this tool is ideal for precision applications and secure fastening tasks. It is typically used in automotive repairs and equipment maintenance. Gedore 6166130 Socket 1/4" Hex 9 mm