With 12-point sockets Drive: Square, hollow 20 mm (3/4 inch) HAZET – quality for professionals that has been proven 100,000 times – well above standard With 12-point sockets Drive: Square, hollow 20 mm (3/4 inch) HAZET – quality for professionals that has been proven 100,000 times – well above standard, Weight: 32.1764671389 pounds, Manufacturer: HAZET