Starrett DY455

A set of six precision gauges for internal measurements of holes or slots, size range 8 to 152mm/ 5//16 to 6in. Each gauge consists of a rigid knurled steel handle with a knurled contact locking screw. The contact points are precision ground to a radius to give proper clearance for the smallest hole the gauge will enter. Constant spring tension gives a uniform contact pressure to ensure measurement. Final size is measured across the contact points with a suitable instrument e.g. vernier caliper or micrometer (see this section). Type = Telescopic Bore Gauge Material = Steel Number of Pieces = 6 Largest Diameter = 152mm Smallest Diameter = 8mm