Total measurement range of 35 to 60 mm Grip reduces influence of heat to retain high-accuracy measurement Two-point contact for detection of geometry problems such as ovality and taper Carbide-tipped contact points for extended wear and improved abrasion resistance The Mitutoyo 511-702 Bore Gauge without Indicator has a measurement range of 35 to 60 mm. The grip reduces the influence of heat from the operator's hand during use to retain high-accuracy measurement. This gauge uses a two-point contact system for the detection of geometry problems such as ovality and taper, and carbide-tipped contact points provide extended wear and improved abrasion resistance.