Zoro Tools
Square drive as per DIN 3120 - D 20, ISO 1174, with locking pin Hand-operated, knurled grip GEDORE vanadium steel 31CrV3, chrome-plated * not standardised * not standardised
Amazon
Gedore Sockets 20 (3/4") 20 (3/4") square drive, Weight: 2.11864233782 Pounds, Manufacturer: Gedore