Set includes 5 pairs of dumbbells for all skill and strength levels. Rack made from steel with a black powder coat and rubber inserts to prevent scratches. The durable, versatile dumbbells are made from ASTM A48 Class 20 grey iron joined together by a solid 1018 cold rolled steel chrome handle. Rack base measures 23.6" x 19.7" and is 32.3" tall. The noise-reducing PVC coating is perfect for home use and safe for all flooring. The hex shape prevents rolling and provides stability for floor exercises.