Your little ramps 躓 Toothpick to prevent chain Note that you can use just type. ■ PRODUCT DESCRIPTION ■ · Special elastomer material the product a non-slip, Note that only make it easy and safe to use. · Surface is non-slip processing on the bottom, so you can walk with confidence even when walking in socks and shoes and accessories. · Tip Ends to smooth shape and with less force, non-slip walking Charger Wheelchair and running. Thermoplastic elastomer material is durable and resistant, which can be used from indoor to outdoor types.