<p>Easy to adjust: Suitable for accurate measurement. Professional Precision Inside Diameter Measuring Tool!</p> <p>Easy to Use: The handles are rigidly attached to the contact plungers and are automatically self-centering, to achieve a perfect fit with the hole.</p> <p>Check Holes Accurately: The rigid, double-action handle with self-centering function allows for quick checking of holes, slots, and recesses up to 6" deep.</p> <p>Advanced Design Concept: The ends of both contacts are made of stainless steel with a head treatment and precision ground to a radius to allow adequate clearance on the smallest hole the gauge will enter.</p> <p>6pcs Gauge Set: 5/16" - 6" (8mm - 150mm): 8-12.7, 12.7-19, 19-32, 32-54, 54-90, and 90-150mm gauges. You can measure different hole sizes with this inside diameter measuring tool.</p> <p>Specification:</p> <p>Material: Hardened tool steel</p> <p>Color: Silver</p> <p>Range:</p> <p>5/16" - 1/2", (8 - 12.7mm)</p> <p>1/2" - 3/4", (12.7 - 19mm)</p> <p>3/4" - 1-1/4", (19 - 32mm)</p> <p>1-1/4" - 2-1/8", (32-54mm)</p> <p>2-1/8" - 3-1/2", (54 - 90mm)</p> <p>3-1/2" - 6" (90 - 152mm)</p> <p>Usage:</p> <p>Under tension With a uniform spring force, the gauge plunger expands from the center to the hole diameter or slot width to be measured, then locked in place by a knurled knob. The hole size is determined by measuring the contact point using a micrometer or gauge.</p> <p>Package Included:</p> <p>6pcs x Precision Telescopic Gage (Packed with bag)</p> <p>Note:</p> <p>Please allow 1-5mm errors due to manual measurement</p> <p>Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.</p><p>becomeveryrich</p>