Stahlwille 725B Bit insertion ratchets size 4

Bit insertion ratchets reversible, with hexagon socket, 1/4" or 5/16", DIN 3126/ISO 1173 D 6,3 or D 8, for direct reception of bits-screwdriver bits 1/4" or 5/16" external hexagon C 6,3 or C 8 (size 4: 22 teeth,size 5: 30 teeth).hexagon socket with ring pressure spring. Bits are easy to insert, lock securely in place and can be pulled out again
without difficulty, also hexagon with wide groove (Form E, DIN 3126/ISO 1173). Supplied without bit. 5/16, for tool holder 9x12 mm