The Bone, No. 6031, from SFA Companies features the patented "Bone" shape and outboard wheel placement which creates a stable platform that doesn't tip, flip, or pinch during use. This design ensures safety while working in tight spaces. This creeper is equipped with custom-molded 5-1/8" diameter wheels that feature oil-impregnated bearings and durable 1" wide tires. These wheels are specifically engineered to roll smoothly over various shop floor obstacles like cords, grates, and more. The creepers design allows for a ground clearance of 1-3/4". The wheels feature heavy, American-made ca-plated steel caster frames with dual race ball bearing swivels.