Leveling Casters with Adjustable Ratchet Handle Design, 360 Degree Swivel Castor

Product Description\nAbout us\n Established in 1997, one of the most famous manufacturer, supplier and developer of casters and carts. We have a design and production team of over 170 people, and more than 20 years of experience in product development and production. We never lower our standard in products. And our biggest vision is: Make your life easier using WBD.\nWBD leveling casters heavy duty set of 4\n--Top Plate Size: 3.5\"" x 3.5\"" (L x W)\n--Bolt Holes Size: 2.75\"" x 2.75\"" (L x W)\n--Adjustable height: 4 inch to 4.5 inch\n--Material : Aluminum body & Rubber base & Nylon wheel\n--Load capacity: Total 3300lbs for 4 casters\n--New Design: each caster has a ratchet handle for height adjustment, safety & labour-saving\n--Application: workbench, machine, equipment, bed, heavy furniture, wooden cabinet, etc\n--When to move, toggle the switch on the ratchet arm to \""down\"" and then dialing the ratchet arm to lower the aluminum body and raise the feet.\n--When to fix, to.