Accessory to drive hook into wall mechanically - is hard metal stepped member of specified dimensions with transverse bore and parallel rectangular slot

摘要

The accessory is intended for driving a hook into a wall mechanically. It consists of a hard metal stepped cylindrical element with a 10 mm dia. 35 mm long portion co-axial with a 30 mm dia. 45 mm long portion. - The larger-diameter portion has an 11 mm dia. transverse bore and, 2 mm from its free end, a 5 x 8 sq.mm. transverse slot parallel to the bore.(1/3)