• Accuracy: ±0.0001". Hardened to HRC 57-60. 3/4" diameter, 1/4-28 I.D.thread. Four connecting screws included; make any length desired.
• Each block clearly marked for size. Hardened and lapped. Complete in fitted case.
• 36-piece set including 9 blocks: 0.101" to 0.109" by 0.001". 15 blocks: 0.050" to 0.190" by 0.010".
• 9 blocks: 0.200" to 1.000" by 0.100". 1 block: 0.0625". 1 block: 0.125".