FEATURE:These small rollers feature a silent ball bearing design that reduces friction, increases speed, extends life, and effectively supports axial, radial, and torque forces generated during rotational or linear motion. They are durable, resistant to breakage and wear, have a smooth surface, roll quickly, and run smoothly on laminate and carpet, leaving no marks or scratches. Additionally, they reduce vibration and noise.APPLICATION:Ball bearing casters are perfect for various uses, DIY applications, Home, office, garage, shop, etc. Low profile casters for small equipment and small space furniture, including chairs,  coffee tables, plant stands, bookshelves, kitchen cabinets, spice cabinets, shoe boxes, toy boxes, trolleys, workbenches, under-bed storage cabinets and other furniture.PACKING LIST:4pcs casters (two screws included for each caster); Wheel diameter: 50 mm/2 inch; Wheel width: 18 mm/0.71 inch; Mounting height: 53 mm/12.4 inch; Base plate dimensions: 68 x 25 mm/2.68 x 0.98 inch; Hole spacing: 54 mm/2.13 inch. Fixed casters can be easily and conveniently installed to meet a variety of needs.NOTE:Pay attention to the load-bearing limit, avoid overloading. Before purchasing, please confirm that the clamp thickness and wheel model match your furniture.