449AZ-3R Starrett Depth Gage with non-rotating blades 0-3" range, 2-12" base By holding the base in one hand, the .045" thick x 18" wide (1 .2 x 3 .2mm) blade can be turned with the fingers and positioned at any angle relative to the base . In operation, blade does not turn, but moves perpendicularly only, pe more...