ENOUGH SIZE - 2X2 Inch black round rubber caster cups, Each round rubber casters cup is large enough to hold the legs of most furniture, and the classic black perfectly with the wood to make the whole look match PREMIUM FURNITURE COASTERS - Made from premium dense rubber, No more sliding around. These grippers actually grip the floor and the couch stays firm in place. will not scratch the floor PREMIUM FLOOR PROTECTORS - Black round rubber casters can withstand heavy furniture (such as sofas, beds, pianos, cabinets, chairs, tables) to the point of protecting the floor from scratches and damage EASY INSTALLATION - You only need to slide the caster cup under the furniture foot, and then let the caster perform its design work