It is designed for fast and accurate measurements of circular form tools, diameter and depth of narrow grooves, slots, keyways, recesses, and depths between lands and fins. 1" thru 12" Range, .001" Grad.
The blades are .030" (0.8mm) thick
Blades will measure to 5/16" (8mm) depths
Balanced frame and thimble design ensure easy handling and better readability
Speeder for quicker adjustment on all sizes
Non-rotating spindle prevents blade from turning in narrow slots or rolling off shoulder
Starrett satin chrome finish - no glare - resists rust
Advanced sleeve design with staggered lines and distinct figures for precise and easy readability