Review on Improved Stability and Balance: BL 123NH Pair Blocks Without Holes for Precise Clamping by Chuck Hernandez

These blocks are strong and heavy. They feel solid and should be strong and show no signs of rusting after a few weeks in a damp environment, but I take care of my tools. They are as accurate as I can measure, which is microns. They are as advertised and are great to install and use in the shop. For the price they are very good and should last a while.