"This Wilson Tuffy Work Station provides the durability and organization essential for busy shops, garages and industrial settings. U.S.A. Shelves qty. 3, Wheel Size in. 4, Wheel Type Swivel caster, Material Type Industrial plastic, steel. Durable thermoplastic resin injection molding will not chip, warp, crack, rust or peel 20-gauge steel locking drawer keeps tools and supplies safe and secure Easy-to-clean non-staining surface 18in.D x 24in.W shelves and a 1/4in. safety retaining lip with a raised texture surface prevent slipping"