Specification Brand : Kuuleyn BulletPoint1 : 【High-quality and Sturdy materials】: The tool is made of superior quality materials with high rigidity and excellent wear , ensuring long-term durability and stability. BulletPoint2 : 【Auto-centering double-action handle】: The tool's double-action handle design is firmly fixed to the plunger, achieving automatic centering and ensuring the accuracy of measurement. BulletPoint3 : 【Depth detection function】: The tool can help users quickly check holes, slots and grooves up to 6 inches deep, improving detection efficiency. BulletPoint4 : 【Precision machined pieces】: The ends of the two pieces are made of head-treated steel material and are precision-ground to provide the appropriate gap for the smallest hole for the gauge to enter, ensuring the accuracy of measurement. BulletPoint5 : 【Uniform pressure】: Constant spring tension ensures uniform pressure during measurement, avoiding erroneous measurements caused by uneven pressure. IncludedComponents : No ItemName : Kuuleyn 6Pcs Telescopic Gauge 8 150mm Adjustable Inner Diameter Gauge Micrometer Measuring Tools,Adjustable Telescopic T Bore Hole Gauges ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 20 centimeters ItemPackageDimensions_Width : 16 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : bore-measurement-gauges Manufacturer : Kuuleyn Material : Alloy Steel MeasurementAccuracy : 0.1mm ModelName : Zjchao7g9nsuiepz-11 ModelNumber : Kuuleynbeo2mh915f NumberOfItems : 1 PartNumber : Kuuleynbeo2mh915f ProductDescription : Specification: 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.