1.USAGE. These glides are great for use on wooden furniture legs. With moisture-proof and anti-skid effect. 2.MATERIAL. Made of plastic and metal material, lasts far longer than stick-on pads and easier replacement. 3.ADVANTAGE. Nail into legs on tables or chairs,help furniture move smoothly over flooring and protect hard floor surfaces from scratching. Product Name: Furniture Feet Glide Nail Color: White Material: Plastic, Metal Shape: Half-Circles Head Size: 24 x 6mm / 0.94 x 0.24inch(D*H) Pin Length: 16mm / 0.63inch Total Length: 22mm / 0.87inch Package Content: 20pcs x Furniture Feet Glide Nail Installation Steps: 1.First drill a small hole in the chair leg. 2.Then hammer the nail into it with a hammer. 3.This method can avoid excessive force leads to bending of the nail.