The Torin BIG RED ATR6551-6PB replacement swivel casters fit most rolling creepers, mechanic carts, shop stools, and dollies with a ball bearing design. Includes 6 swivel casters (3 pairs) with a chrome-plated frame. Each caster has a load capacity of 85 lbs and a PVC wheel measuring 2. 5" in diameter. The Torin swivel casters deliver a 360-degree rotation, providing smooth and precise maneuverability. Features a threaded-post mount with square base, flush cap, and washer/lock-washer with cap nut. The top-mount post screw tightens easily. Manufactured with precision for quality and performance. Includes a limited 1 year manufacturer .