Very strong spring steel clips with plastic coating for holding in place zig zag springs (also known as snake springs or sinuous springs). Holes in the longer base are slotted to allow nailing in the end of both channels. The spring is fitted inside the clip and then closed off by hammering down and securing with clouts or blued tack nails through both the holes in top section and the already positioned longer base. The plastic coating helps prevent against squeaking springs when metal rubs together. Clout nails and Blued tack nails are available elsewhere on this website.