The RS PRO telescopic gauge set. Each of the six chrome gauges is designed to provide a high level of precision in machining and fabrication application. Offering excellent ease of use, operator simply needs to expand the gauge inside the hole you're measuring and lock the plungers in place using the locking screw at the bottom of the handle. After removing the gauge, measure the distance between the ends of the locked plungers using a micrometre or a Caliper which will identify size.
Two plungers under equal and constant spring pressure can be locked between the walls of a slot or across the diameter of a space.

RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.