Smart Plugs offer a fast, robust, and easy-to use measurement option, offering superb accuracy and repeatability to less than 0.00005".The reliable 2-point measuring system is designed to withstand harsh manufacturing floor environments. Smart plugs are manufactured to specific diameters and offer short measurement ranges (around 0.007"). This dedicated design is a great fit for high-volume manufacturing and quality control. Features Tough, robust construction Easy-to-use Long life High accuracy Flexible, modular Hand-held measurement. Cost-effective High visibility displays All setting rings supplied as standard with UKAS calibration certificates. Cover plates as standard on all Smart Plugs, for protection of gage head. Thread: M10x1