Dynabrade 51753 .1 hp Straight-Line Extension Pencil Grinder, Rear Exhaust, 50,000 RPM, 1/8" Collet 
Insize 3224-80, TUBULAR INSIDE MICROMETER, 40-80″, 6928640356803
$1,498.14
Graduation .001″
Accuracy: [.00005(7+n+L/2)]”, n=number of rods,L=maximum measuring length (inch).
Carbide measuring faces.
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