Whiteside Manufacturing USA Made - Professional Heavy-Duty 40" Creeper with 6" No-Matic Rollers (MTLPNEU) 40 inch metal frame creeper; heavy-duty 1 inch steel frame Skewed rails provide added comfort while working Powder coated to resist rusting Four 6 inch No-Matic wheels roll easily on smooth and rough surfaces Ground clearance: 3-3/4 inch