Features 【Durable In Use】Micrometer measuring tools have super quality, high rigidness, good wear resistance, durable in use. 【Stable Performance】The ends of both contact of hole gauges are head treated steel and precision ground to a radius allowing proper clearance on the smallest hole the gauge will enter. 【Convenient To Use】Adjustable Inner Diameter Gauge has Double action handles are rigidly attached to the contact plungers and are automatically self-centering. 【Great Function】T bore hole gauge set can assist in quick checking of holes, slots and recess up to 6 inch deep. 【Practical Accessory】6pcs Telescopic gauge has constant spring tension delivers uniform contact pressure. Specification: Condition: Brand new Material: Tool steel Color: Shown as picture Measuring Range: 8-150mm Accuracy: 0.1 Quantity: 6Pcs/Set (ABCDEF) Scope of Application: Telescopic spring piston in the hole (or groove), can conduct inner diameter detection, used with micrometer or caliper, with knurled locking device. Package List: 1 Set Telescopic Gauge (6pcs) Package List