The extra-long half ball small hole gage set allows for gaging both deep and shallow holes and slots. The split ball is constructed of hardened steel for accurate, repeatable two-point contact measurements. These hole gages are used with outside micrometers for measuring the inside diameter of bores.
Set includes four sizes of gages in a fitted case
Half ball with flat bottom design allows for diameter measurements at the bottom of bore holes, slots and grooves
Gaging surfaces are constructed of fully hardened steel for longer tool accuracy and lifespan
Satin chrome finish with knurled handle provides confident grip and resists rust