Review on Discover the Game-Changing Broadfix Revolutionary Flat Shims (1, 60)! by Jay Aukuso

From seller's description: Exact fit and alignment. Well that's a lie. I wish I had paid more attention to the size, that would be a big red flag. Something can't be 1/4 inch and 6mm at the same time, that math doesn't work. 1/4 inch is 6.35mm. So if you put four together for a 1" spacer, not that much. Each color varies in thickness, so you'll have to play around with them and a caliper to get something accurate. If you stick to your size you can make them work, they seem flat, you just can't get past the description or the color size. I only paid $8 for it and can get it working. Definitely NOT worth the current price of $13+. At this price, there are better options to choose from at Revain.