First off, these are nice casters and you'll be pleased if they're what you need. However, in retrospect, I have some thoughts on that. If you're buying these for a tool stand, like a bench grinder or a router table like I was, then you may want one pair of casters to swivel and to lock, but the second pair to be fixed. So even if the other pair you ordered, locks, this pair still allows it's end of the stand to move around which I find to be a nuisance. Notice the ones that came on your table-saw. One pair swivels and locks, the other pair is fixed and doesn't swivel. But maybe that's my bad, for taking Amazon's recommendation on "customers who bought this also bought this." Another, maybe bigger consideration, be aware that the stud on these is not only metric, but the diameter is larger than the pre-drilled holes in most tool stands. Again, unfortunately, Amazon, listed them under the "customers who bought this, also bought this", and unfortunately, I didn't double-check the size (which wasn't listed, anyway), and as you might guess they didn't fit the tool stand that I ordered. Maybe that was my bad, too, assuming that whoever had paired the two purchases had done their homework. One other thing, you'll need a thinner-than-usual wrench to hold the nut at the bottom of the stud tight as you're tightening the nut on top against your tool stand leg. Or, when you finally find the right sized metric nuts, buy an extra as I did, and tighten it down to the existing nut as a spacer. Sorry if that's not clear. Anyway, they're very nice if you can make them work
