The Rabenda 12 Pcs Grippers Non-Slip Rug Pads are designed for hardwood floors and tiles. With a triangular shape and a grid pattern, these black pads are made of 100% PU fabric and come in a set of 12. They are suitable for any room and are easy to clean with hand wash only. The non-slip feature ensures that your mat or rug stays in place, providing a secure and stable positioning on concrete surfaces. Made by the brand Rabenda, these grippers are lightweight at 5.6 ounces each and are a practical solution for keeping your rugs and carpets in place.