This drill bit extension shaft is constructed from plastic and metal, available in black. It features a hex design with both shank and head measuring 6.35mm (1/4 inch). The extension comes in lengths of 200mm and 295mm, ideal for tasks like computer case assembly and furniture repair. Condition is , and the package includes one shaft connecting link.Usage notes: Compatible only with charging drills and air batches; avoid use with hand drills or hammer drills. When operating with a charging drill, adjust torque appropriately to over-tightening and damage to the shaft.