Review on 40Pcs Parallel Hardened Precision Machinist: Ensuring Accurate and Consistent Machining Results by Nick Moody

Junk. Partly rusty, probably due to arrival from China. I'd like to clean them up and use them if they were parallel. But there's a catch. Two equal parallels were not just different sizes. They weren't even the same size from end to end. One of the 1/2 inch parallels measures .4999 throughout. The other is 0.5002 on one end and 0.4993 on the other. You really do get what you pay for. received were pretty good.