Case of 100 RG-11 Rug Clips with 100 RG-12 Inserts. The patented RG-11 is strong. Its unique, patented design allows this clip to hold the heaviest rugs on the market today. The RG-12 is a strong plastic insert that fits into the RG-11 only and provides protection for thin, light, delicate rugs. Shipped FedEx Ground (Standard) Shipping Only.