Four stars because these pallets do exactly what I wanted: They made the family trunks I have in storage slide out easily from under the overhanging shelf. I no longer have to crank them out one edge at a time or push them back in against a lot of resistance. One star off because: * No instructions. You wouldn’t think you’d need any for something this simple, but it took this college grad with four (!) degrees a long time to figure out that the bolts to attach the casters drop down from the top, not come up from the bottom, even with holes for countersinking them easy to see. * Not all the countersinking holes are deep enough to do the job. If you’re fussy about perfection or need a completely flat surface, and have neither the tools nor the inclination to deepen them, you’ll find that some of the bolt caps protrude a bit. No biggie for my needs. * Packaging. These were probably packaged okay in the factory, but the factory is in China and the packaging doesn’t hold up well to shipping. I ordered two pallets; the first one was okay, with some tears (the rip kind, not the eyeball kind). The second package didn’t do as well. The plastic bag holding the nuts, bolts, and washers was torn, so several pieces had escaped into the small cardboard box that also holds the casters, and some of those pieces also escaped that, which was also badly torn. And one of the nuts had escaped the whole shebang and is likely still rolling around a cargo hold or shipping container somewhere in the Pacific Theater. That meant a trip to our local (independent) hardware store for a replacement. Attendere (See previous note on the value of a college education): On the first caster I affixed I carefully tightened the bolts as I went, only to find that the fourth hole and its bolt didn’t align. I had to loosen the first three and start again. Align all four, insert the bolts loosely, and tighten in rotation. My dad had taught me better, but I got fussy and forgot. On the third caster, I carefully tightened all four nuts, terribly pleased with myself, only to find the caster still resting on the work table. So. 1. Bolts drop down from the top (rest the pallet on its edge and work from side to side). 2. Washers first, nuts second, tighten each one a little bit at a time unti they’re all done. 3. The nuts will only tighten easily so far. Then you’ll need a wrench or some good pliers to hold them steady while you use the screwdriver to finish it. Or, which worked better for me, use the screwdriver to hold the bolt steady and the wrench to turn the nut. And remember: Righty-tightly, lefty-loosey.