6pcs Precision Telescoping T-Bore Gauge Set 5/16" - 6" Range T-Bore Hole Gage Inner Diameter Measuring Gauge Kit

Description: Brand New and High Quality. Features: * This Telescopic Inner Diameter Measuring Gauge made from high quality Carbon Steel, very durable and long service life. * Double action rigid handle with self centering feature for quick checking of holes, slots and recess up to 6" deep. * The ends of both contact are head treated stainless steel and precision ground to a radius to allow proper clearance on the smallest hole the gage will enter. * Constant spring tension gives uniform contact pressure. * Nickel-plated finished. * The telescoping gauges are used to measure internal diameter or internal through-groove of the workpiece by comparative method. Specifications: Material: Carbon Steel Color: Silver Dimensions: Size A: 5/16" - 1/2" ( 8mm to 12.7mm ) Size B: 1/2"- 3/4" ( 12.7mm to 19mm ) Size C: 3/4" - 1-1/4" ( 19mm to 32mm ) Size D: 1-1/4" - 2-1/8" ( 32mm to 54mm ) Size E: 2-1/8" - 3-1/2" ( 54mm to 90mm ) Size F: 3-1/2" - 6" ( 90mm to 150mm ) Measuring range: 8-150mm ( 5/16" to 6" ) Package Includes: 6Pcs x Telescopic Inner Diameter Measuring Gauge Usage: Under uniform spring tension, the plunger of the gage expand from the center to the diameter of the hole or width of slot being measured and then locked in place by a knurled knob, the hole size is found by measuring over the two contact point with a micrometer or caliper. Note: 1. Please allow 1-3 cm error due to manual measurement. 2. As different computers display colors differently, the color of the actual item may vary slightly from the above images, thanks for your understanding.