Review on Uxcell Swivel Casters Threaded Furniture by Eric Rios

Just what I needed for my leather office chair with four swivel wheels. (A grub screw on the previous wheels broke off.) Wheels with M8 x 13-15 grub screws are hard to find. Most posts are wider and/or longer. Ditto for alternate posts 5/16-18 x 1/2. Most casters of this size have a plastic cap and tend to tilt slightly when the person sits in the chair causing the cap to rub against the bottom of the chair and stop spinning. They work well, although rolling rubber wheels (compared to nylon wheels) "sticks" a bit to the wooden floor.