Review on 🔩 Glarks 220-Piece Zinc Plated Carbon Steel Rivet Nut Kit: Threaded Insert Nutsert for M3/M4/M5/M6/M8/M10/M12 - High-Quality Mixed Sizes by Mark Albright

Good quality for the price. Package comes with all content together (should have better design for dividers), seller solve the problem very quickly. Use it to fix the roof rails on my 1992 Previa, the original anchor was M5. I replaced it with M6 and it works great. I didn't have to buy any special tools, just a homemade tool using a 2 1/2" long M6 bolt and two nuts: one M6, a slightly larger one, and a couple of washers. If you google there are several types, but this is the basic one same. Make sure the hole is tight to prevent the nut rod from turning. Probably not using the M3, it has most of the parts (70) in the kit but good to have it just in case.