The SSZY Set of 8 Rug Grippers work very well. They prevent an area rug from moving and slipping and flattens the rug and it doesn't look uneven on the floor. The y grip the rug to the floor. These rug grippers were easy to install. 2 of them go in each corner of the rug. It is important that the underside of the rug and the floor are clean so that the grippers stick well. The white side of the rug gripper sticks to the rug and the transparent side sticks to the floor. When the rug grippers are removed there are no glue marks on the floor. Free replacement or a refund are offered by SSZY Home if you don't like the rug grippers but I recommend them. #RankBoosterReview ii, #Sponsored iii, #SSZY Set of 8 Rug Grippers, https://www.amazon.com/gp/product/B07CHXHLJP/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1