Gedore D 19 1.1/16AF 6137890 Bits 1 1/16 1/2 (12.5 mm)

Square drive as per DIN 3120 - C 12.5, ISO 1174, with ball retaining groove · Hand-operated, knurled grip · GEDORE vanadium steel 31CrV3, polished, chrome-plated

Price: 21.99 from Conrad Electronic