Fowler 526464000 Dial Bore Gage Set

Bore gages measure holes, or bores, in a workpiece. They can measure the interior diameter of a hole at any depth, while internal micrometers can only measure to the depth of their anvils. Bore gages have a two- or three-point contact, indicating how many points on the gage head touch the inside of the bore. Two-point contacts are better at measuring ovality, while three-point contacts are used to measure lobing or triangular form error. Pistol-grip bore gages are used for fast, single-handed operation with repeatable results from one operator to another. The company, founded in 1946, is headquartered in Newton, MA. ACCURATE MEASUREMENTS : The bore gage features a dial indicator graduated in 0.0001 inch and has a measuring depth of 9.5 inches DURABLE CONSTRUCTION: This indicator with a chrome-plated handle and a two-point contact system is used to detect geometry problems such as ovality and taper; carbide-tipped contact points provide extended wear and improved abrasion resistance SET INCLUDES: 2 self-centering measuring heads, an extension holder, 15 anvils, 4 spacers and a fitted case CHROME PLATED: This bore gage is chrome plated to prevent rust and features an insulated handle for a no-slip grip