Cuplock Scaffolding System. This type of cuplock systems permits up to four horizontals to be connected in vertical manner in one single action without using bolts and nuts. The locking devices are quite versatile and are formed with two cups, the upper cup is sliding, and the lower cup is welded to the vertical component at pre-located intervals. The upper cup is lowered down and revolved to secure the components in place and then a hemmer blow result in a rigid and positive connection, the forged blade ends of the horizontal components are located into the lower cup.