|The jet black straight grooves on both sides of the master bar allow for positive alignment of graduations and flush fitting of the vernier scales to the main scale, which eliminates parallax.
Can measure outside diameter (O.D), inside diameter (I.D), depth and steps
Stainless steel, hardened throughout. Satin chrome finished vernier and main scale with jet black graduations for
glare free reading. All graduations are marked by laser machine for accuracy.
With depth measuring bar