The clip and ring are made of silver steel or galvanized steel. The clip is produced by coiled steel. It is cut and divided like a flat line and then used a machine to pump it up into a ball clip. Regarding to C-ing, it is made from round wire and then used by a stamping machine to form a C-ing.

Clips and C-ing are used for structural assembly of spring mattress, furniture, sofa, frame, and cushion.