SET OF 6 CREEPER WHEELS: 6 Pack x 2.5 inch 360 Degree Swivel Stem Caster. Threaded-post mount design, stem size: M10x25mm(D*H), casters diameter: 2.5 inch. HEAVY DUTY CREEPER CASTERS: Each swivel caster wheel supports 100 lbs. Suitable for carts, chairs, cabinets, and other furniture. These caster wheels make it easier to move tables, seats, shelves, and heavy items. SMOOTH & QUIET MOVEMENT: Smooth, quiet, and non-marking polyurethane swivel caster wheels. Allows flexible movement of scaffolds, mechanic creepers, and easy, stable positioning. MULTIPURPOSE USE: Replacement casters ideal for mechanic's creepers, service carts, cabinets, stools, chairs, and more. 2.5 INCH SWIVEL CASTER WHEELS: Heavy-duty steel axle with rust-resistant chrome finish. 360-degree swivel design. For 4 Pack, reference ASIN B091BSHV2S. For 6 Pack, reference ASIN B07XF9VS8R. For 12 Pack, reference ASIN B091BTNJR3.