General description 18mm extra deep impact socket, designed for use on air/electric impact guns or impact drivers. This socket is part of a range of extra deep sockets from 10mm to 32mm. Technical specifications Size: 18mm single Hex x 1/2"D Extra deep length: 120mm Material: Chrome Molybdenum Finish: Black phosphate Compatibility and accessories Available in a 14pc set - please see Laser Part No. 7759.