Swivel Wheel Casters 2-1/2"x1-7/8" Top Plate Wheels Caster Toolbox Creeper Sold as a single unit, this quality caster is a perfect replacement for a variety of uses, from toolboxes to creepers. The 1-7/8" x 7/8" swivel wheel is made of durable polyurethane and sits atop a sturdy steel mounting plate that measures 2-1/2"x1-7/8" inches. The caster has a caster height of 2-1/2 inches and utilizes ball bearings for smooth swiveling action. Whether you're looking to improve the mobility of your toolbox or need to replace the wheels on your creeper, this caster is the perfect solution. Thanks for stopping. Please visit my slow growing store, read about me, my policies and view other items that may interest you. Also, check out my other casters wheels. **I always have money saving volume discounts on most items** David - thediscountretailer