75mm Side-Brake Top Stem Casters Swivel Wheels Casters of METRIC Size M8--1.25x 25mm Threads / M10--1.50x 25mm Threads. Please check the size carefully to match the right size for your need! Dual roller bearing & With single Locking -- The dual roller bearing increase the Swivel flexibility, the locking make sure the casters can be stopped at any speed any place. Capacity is 50kg each. Practical and Convenienct to use! Features -- 360-Degree Flexibility; HEAVY DUTY bearing; Smooth & Silent & Sturdy; Safe to floors! Complete Accessorries & Easy to install -- Included Hex Lock Nuts, Washers, Insert Nuts and Wrench. The installation is simple and convenient, easy to install it on different places and good use for any occasion! Widely-used -- Suitable to use at almost all industrial applications, like Automobile, mechanical industries, shipment carts, home etc.