DICASAL 2" Stem Casters, Heavy Duty Swivel Stem Casters PU Foam Quite Mute No Noise Castors Markless Wheels Double Bearings and Locks Loading 300 Lbs Pack of 4 with Brake Black

overall quality appears to very good. A recommended pilot drill size for threaded inserts would be a good idea.

Added these to my table saw base- really easy to assemble, even came with the right size wrench

These wheels are just short of perfect. The wheels are excellent: no noise, non-marking, solid. They rotate easily...good bearings. A very sturdy design as there is little offset between the wheel axle and the stem (so less likely that the unit will crush under extreme weight). Here are the only two issues I found. Neither were big enough for me to return, but they may cause me to hesitate to buy again and that's a shame:1) Biggest problem: the stem is poorly designed in terms of how each element is stacked on the screw bolt. In its current design (as of this writing) the wide black metal collar over the wheel has a big depression in the center. This means that the pre-installed nut screwed onto the stem rests into this depression. This leaves very little of the nut exposed beyond the collar. This means that when you screw the stem bolt onto your shelf leg, there is virtually NO space in which to tighten the bolt onto the shelf leg. The included mini wrench is a nice bonus, but even that tool is too thick to get in the space. Moreover, jamming the wrench in there scrapes the bottom surface of the shelf leg! Bad! So I had to hack the installation by adding a second nut to the screw stem and THEN installing the wheel. This, of course, gave me plenty of nut surface to tighten the wheel to the shelf leg, but this hack looks sloppy and now gives TWO opportunities for unintended loosening down the road. SInce I don't plan to load these sheles with too much weight, I think the hack will work, but if this was a heavy load project, I'd return the wheels.2) the locking mechanism is very robust, however, it is SO difficult to engage, I had to put my entire body weight on the mechanism and it was still hit or miss if I could engage it. I weigh 150lbs, so it should engage! Upon inspection, I realized that the mechanism is one of those types that has to literally "bite" inito the wheel to brake it. But given the softness of the wheel (good for silence), the edge of the brake sinks into the wheel surface, thus making the locking tab's movement arc ineffective as a lever to easily bite the wheel. This arc is naturally very limited when the wheel diamter is only 2"...if the tab were longer, it would likely scrape the floor when engaged -super bad. On the wheels where I was finally able to engage the lock, I looked at the brake and the biting edge literally sank into the surface of the wheel, making me worry that, over time, the wheel's surface could become cut and ragged and start to not roll as smoothly. So I think that either this locking mechanism needs to be adjusted to bite the wheel in a different way or an entirely different locking mechanism is needed here.

I bought some very heavy patio umbrella stands from the orange big box store a few years ago. Over time the rubber/plastic wheels failed. I searched and searched for replacements and stumbled on these. They are perfect replacements for the OEM casters. I expect them to last a few years out in the elements.

The area I have available for some of my shop tools is limited, so I have to be able to move the tools easily in order to use them. I have put them on a table saw, a planer, a grinder , and a band saw. So far I've been quite pleased with the casters' performance. I've used them for a short period, so it remains to be seen how they hold up over time.The key deciding factor in purchasing these is the fact that the lock keeps the wheel from turning while also keeping the caster from rotating -- something critical to keeping power tools stable while in use. A second major factor was the cost relative to similar products elsewhere.Installing them into metal stands with existing holes in the base of the legs was quite easy, needing only to insert the stem of the caster through the hole and then secure with a lock washer and nut. Inserting the caster into the bottom of a wooden leg was more of a challenge (and the only reason for giving 4 stars rather than 5). For inserting into the bottom of wooden legs, each caster comes with a metal insert that has external threads for the wood and internal threads to receive the caster. It was challenging to get the inserts into wood legs that measured about 2" x 2.5". (I have answered a question about that elsewhere here to explain how I did it.)