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Features

Dial Bore Gauge -- Range from 1.4" - 6"/35mm-150mm; bore to 9 inches/228.6mm deep; Accuracy 0.00005"/.001mm.
Dial Bore Gauge Indicator -- provides both inch and metric readings for convenience for different usage habits. Two-point contact is used to detect geometric diameter measurement problems such as ovality and taper, making repairs more efficient and hassle-free.
Self-Centering Bore Gage -- The easily adjustable bore gage is self-centering, and electric bore gage can lock and hold the bore size as the gage is rocked within the part to be measured to ensure fast and accurate measurements.
Cylinder Bore Gauge -- Electronic indicator with resolution of 0.00005"/.001mm and measuring depth of 9 inches enables the user to measure cylinder out-of-roundness without disassembling the piston. Premium grade carbide-tipped contact points provide extended wear and improved abrasion resistance for long-lasting reliability.
Package Included --Dial bore gage with an insulated grip, 1 Digital Dial Indicator, 15 measuring anvils, 3 spacers, 1 ABS storage case, 1 measuring extended heads, 1 chrome plated handle.

The measuring range of dial bore gage is 1.4" to 6" (35 mm to 150 mm),
The measuring depth is 9.5", features dual reading inch/metric electronic indicator with resolution of 0.00005" (0.001 mm).

54-646-401 Dial Bore Gage are available with an electronic indicator providing inch/ metric reading capability.
The display of this Dial Bore Gage could be set to function on either inch or metric with the switchable resolution, depending on the workpiece tolerance.
Comes with Instructions, easy to use. Follow the instructions to properly measure holes, or bores, in a workpiece.

54-646-401 Digital Dial Bore Gage is easily adjustable, self-centering, and includes 2″ contact extension.
Fast simple checking for bores—size, ovality, taper, etc.
The easily adjustable bore gage is self-centering, and electric bore gage can lock and hold the bore size as the gage is rocked within the part to be measured to ensure fast and accurate measurements.

54-646-401-0 bore gage has carbide anvils, shop hardened case and chrome plated handle.
Premium grade carbide-tipped contact points provide extended wear and improved abrasion for long-lasting reliability.