Whiteside Manufacturing USA Made - Professional Convertible Creeper Seat (CRS) The convertible creeper seat is made from 3/4 inch steel tube frame steel that has been powder coated to prevent rusting Seat work's on a positive locking mechanism and the push-pin release allows for easy conversion back to a creeper The convertible creeper seat has six 2-1/2 inch oil-resistant rollers that swivel with ease Ground clearance: 2-1/2 inch