The Grainger Approved Furniture Glides Screw-In are screw-in style furniture glides designed to help protect floors from scratches and dents. They feature a low profile plastic base with a felt pad on the bottom. The plastic base has threads to allow screwing it into the furniture leg. The glides come in a pack of 4 and have a weight capacity of 75 lbs per glide. They are made of durable plastic and felt and measure 1-1/4" diameter x 3/8" high. The glides can help furniture slide more smoothly across the floor while also preventing scratches, gouges and noise. They are an economical way to protect hardwood, tile, laminate and other flooring types.