Premium High Precision Smooth Operation Telescoping Bore Gauges
Telescoping gages are used for determining the true size of holes, slots, and recesses up to 6" (150 mm). The ends of both contacts are hardened and ground to a radius to allow proper clearance on the smallest hole the gage will enter. The final hole size is obtained by measuring over the gage contacts with a micrometer or calipers.
6 Pieces range: 5/16" - 6"
Smooth adjustment, spring loaded with knurled locking knob and knurled holding area
Spherical Hardened Precision Grounded and polished measuring faces
Satin chrome finish
Hard Shell Padded Case Included