21mm Metric Scaffolders Scaffolding Impact Socket 1/2" Drive with Pin + O Ring

Amazon

21mm Scaffolders socket 6 sided / single hex socket for maximum grip Suitable for erecting scaffolding and steel fencing Impacted socket for maximum strength and durability Comes complete with retaining pin and O-Ring, Weight: 0.3747858454 pounds, Manufacturer: AB Tools

Zoro Tools

21mm Impact socket with retaining pin and O Ring. Drive: 1/2" Size: 21mm Length: 52mm Retaining Pin & O Ring Included Strong CR-MO. HRC42-48 Material Phosphate Finish