1. Double action handles are rigidly attached to the plungers and are automatically self-centering.2. Assist in quick checking of holes, slots and recess up to 6 inch deep.3. The ends of both are head treated steel and ground to a radius allowing proper clearance on the smallest hole the gauge will enter.4. Constant spring tension delivers uniform pressure.5. Super quality, high rigidness, good wear resistance, in use. Buy Car Headlights Eyebrow Eyelids Trim Cover,Carbon Fiber Headlight Eyelids Car Accessories,Compatible For Honda Fit 2014-2016 Scope of application: The telescopic spring piston in the hole (or ) allows the inner diameter to be detected and is used in micrometers or calipers with knurled locking device. Please enter your model number. Aazon.co: 6Pcs/Set Telescopic Gauge Set 8-150 Adjustable Inner... Bore Gauge Set 6Pcs Telescopic Gauge 8-150mm Adjustable Inner Diameter Gauge Micrometer Measuring Tools Snap Guage Set Specification:Features:Double action handles are rigidly attached to the plungers and are automatically self-centering. Mitutoyo 155-127 Gauge - Telescopic - Satin Chome - 8-12.7mm Key Features: Quickly inspect holes, slots and gaps up to 6 inches deep. The dual-action handle is firmly connected to the plunger and automatically centers itself. Super , high rigidity, good wear resistance, use. The ends of both are head treated steel and ground to a radius allowing proper clearance on the smallest hole the gauge will enter.