Product description<br><br><br><br>Size within +/- .0003"<br><br>Flatness and parallelism within .0002"<br><br>Accuracy and squareness on all sides within .0001"-.0002"<br><br>Pairs are matched to a tolerance of 0.0002"<br><br>Product application<br><br><br><br>Used for set-up. layout and inspection jobs<br><br>Product features<br><br><br><br>Has no holes<br><br>Made of hardened tool steel and precision ground on all six sides<br><br>Cross drilling design allows efficient use of lower weight with maximum strength<br><br>Heat treat and hardness 56 to 60 RC<br><br>2 pieces per set<br><br>Weight: 2.1 Lbs