Telescopic Gauge Set T Bore Hole Precision Telescoping Gauges Versatile inner diameter measurement tool for precise and accurate readings. Suitable for measuring slots, holes, hole depth, internal pipe diameters, or the internal size of an object. Enables quick checks of holes, slots and recesses up to 6 inches deep. Durable construction for longlasting use. Made of tool steel material with ends of both contact points head treated steel and precision ground to a radius, allowing proper clearance on the smallest hole the gauge will enter. Constant spring tension delivers uniform contact pressure. Wide adjustable range with reliable operation. Adjustable micrometer has a broad range of 8150 mm. Double action handles are rigidly attached to the contact plungers and are automatically selfcentering. A practical and economical option to meet different measuring needs. Easy to use and read. The squared head design provides a firm grip for measurement and makes readings easier to interpret. Practical applications Measuring internal diameters in engine blocks, housings, and cylinders. Checking slot widths and recess depths in machined parts and fixtures. Verifying internal diameters of pipes or hollow components and assessing hole depths in assemblies. Technical specifications at a glance Range: 8150 mm Depth capability: up to 6 inches deep Material: tool steel Ends: headtreated steel, precision ground to a radius Tension: constant spring pressure Design: squared head for grip and readability Selfcentering: yes via doubleaction handles