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

Unbelievable price! Right out of the box, they're tested within 0.0002! You can't beat them for that much money. The edges are finished but not sharp enough to cut or scrape. The corners are beveled right at the ends to avoid splitting. They're highly polished and have that weird cosmo/petro/beeswax mix that's going into it all. But it protects it from rusting in storage and is pretty easy to remove. Definitely recommend!