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Ground and graduated main vials
Hard and stable one-piece thimble with rachet lock permits one-hand operation of micrometer and uniform contact pressure
Anvil positioning range: 1”/25mm
100" / revolution
Accurate and reliable
Starrett 449AZ-3R Depth Micrometer with Non-Rotating Blade, 0-3" Range, .001" Graduation Surface Gage Ground and graduated main vialsItem Description Range: 0 3" Graduation: . 001" Accuracy: Mic head + . 0001"; rods + . 0002" The depths of holes, slots, shoulders and projections can be measured with these fine tools Non rotating blade: blade does not turn, but moves perpendicularly only 2 1 2" (63mm) base . 045" thick x 1 8" wide (1. 2 x 3. 2mm) blade Combination ratchet and speeder for uniform pressure and quicker adjustment Ring type knurled lock nut for quick and sure locking