Description: Each steel block has been machined exactly to its claimed dimensions, making these the perfect tools for the calibration of measuring equipment and more. Each individual set includes a 1/4 block, a 1/2 block, a 1 block, a 2 block, a 3 block, a 4 block, a 5 block, a 10 block, a 15 block, a 20, a 25 block, and a 30 block, all of which stay organized in the easy-to-store carrying case. Features: Perfect for machinists and metalworkers; measure angles with maximum precision .
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