are little plastic, felt, or steel protectors attached to the bottoms of chair and table legs for ease of movement and to prevent floor scratches. Glides also reduce friction which prevents stressed joints and other problems. When choosing glides for your chairs, make sure that you choose the appropriate glide for the surface it will be in contact with. Felt glides are the most gentle and are used for wood, stone, vinyl, cork or any smooth surface. Use plastic glides when your chairs or tables could be on multiple floor types. Nickel plated steel glides are commonly used for carpet floors. A glide's base diameter should be slightly smaller than the leg. Steel glides can come with a single prong attachment or 3-prong attachment (see pictures below). Single prong glides are used on legs of smaller diameters. Use 3-prong glides when your furniture leg is 1" in diameter or greater.