Heavy-Duty 400 LBS Weight Capacity: Constructed with a reinforced alloy steel frame and reinforced crossbar structure, this creeper safely supports up to 400 lbs. The 3mm thick steel legs and non-slip feet deliver excellent stability for heavy engine and transmission work, while the black rust-resistant coating ensures long-term durability. Smooth & Stable Maneuverability: Designed with 4-inch dual-lock swivel casters including 2 fixed and 2 rotating wheels for easy movement on garage floors. 360° rotating wheels with sealed bearings reduce wobble, and the dual brake system secures height and position instantly. Its slim 24-inch width fits well in tight spaces.