Accuracy: high precision, the parallel block is a piece with 23 holes 2x3x4 inches precision in three parts per million.
Quality: made of high quality steel, high hardness, not easy to deform, not easy to wear, durable, the six sides of the two blocks are hardened and ground.
Operation: simple operation, easy to use.
Product includes: a pair of 23 holes 2x3x4 inches parallel blocks.
Note: Please confirm the precision when purchasing to avoid buying the wrong one, so as not to delay your time.
