Starrett Thickness Gage STR-806D

Feeler gauges are a vital tool for checking valve tolerance, point gaps, and other narrow slots. . Starrett 806 thickness gage holders provide a handy, convenient means of rigidly holding single leaves or strips of thickness gage stock of any thickness from .001-.025" (0.03-0.5mm). Stock up to 6" (150mm) long is easily inserted in the holder and firmly gripped in the desired position by a cam lock. This permits all of the stock to be used, because as it wears from use, the defective end can be snipped off and new stock pulled out until entirely used up. Thickness Gage Holder - Clamps Stock at Both Ends.