This caster features a reliable structural design, with a unique material and shape that provides shock-absorbing functionality. Even under heavy loads, it won’t damage floors or leave any marks. The spherical roller design effectively reduces friction with the ground, making it easy to move heavy objects on equipment while saving physical effort for more efficient mobility. Equipped with swivel ball bearings, the caster consists of a spherical roller and a long insertion rod. The high-quality steel ball bearing design ensures 360° smooth rotation with low resistance, quiet operation, and non-slip performance even at high speeds. The widened wheel surface maintains smooth rotation under heavy loads, offering excellent stability. In terms of materials, the 2 in. (38 mm) diameter small caster uses PP material, while the wheel cover adopts a heavy-duty steel structure (including 4 mounting bases), with an overall load capacity of 1,200 lbs. The caster’s uniform hardness and good friction performance significantly extend its service life. It has a wide range of applications, suitable for both industrial and civil use, including coffee tables, carts, cabinets, plant stands, bookshelves, shopping carts, exhibition equipment, trolleys, mobile workstations, and various furniture. The 4-pack DIY furniture casters allow easy installation of wheeled designs for living room tables or replacement of old wheels on existing furniture, completed in just a few minutes for convenient use.