Three Mounting Options: Screw in in place of the existing threaded feet. Screw into the hole, washers and nuts are included. You drilled a deep hole in the wooden frame, screw the wheels into the walnut nuts. Allen key not included. Very satisfied, didn't expect the box to be a complete set, don't remember mentioning additional equipment and tools, but again that was a week ago π. They roll very gently. / silently across my tiled floor, spins just as smoothly, on factory-lubed ball bearings, which is definitely not typical. The grease may attract some dust over time, but the swivels won't be stubborn under load. If you want them lube free, flush them with brake cleaner. Outside! The wheel hub is plastic (PVC?) and runs directly on the axles with no bearings, which creates friction and wears out with heavy use/abuse, but isn't really a problem unless you need to push heavy objects a long distance at once . or plan to create a high-speed shopping cart. Putting dry teflon sheeting on the axle holes would be a bad idea. One interesting thing is that the orange color of the wheels is very noticeable in peripheral vision, making it less likely to hit or trip over the reel if the wheel is sticking out. .Wheel locks are made of durable steel that can undoubtedly withstand abuse. Unfortunately, all castors have a lock on the same side, but that's more of an info than a complaint. Feet, now I can move all the gear at once instead of offloading it or trying to move it loaded with a few hundred pounds of gear. Not exactly intended for living room furniture, but I like that it adds a bit of color excitement to a room dominated by earth tones and matte black. See photos.
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