For Accurate Checking Of Slots & Grooves
Unique, flat rod fits into slots and grooves as narrow as .045" and measures depth from 0" to 3". Rotates, doesn't turn with the spindle, can't "walk" or roll off an edge. Reads to .001" ratcheting knob, base and three, hardened ground and lapped rods.
Big Book Catalog, Issue:68, Page:479
New Product Supplement, Issue:511, Page:000
SPECS: 21/2" (6.3cm) long x .403" (10.2cm) wide base. Rods are .125" (3.2mm) wide x .0445" (1.1mm) thick. Satin, chrome plated.