The Mitutoyo interchangeable rods provide flexible depth measurements over a wide range using interchangeable rods. Features and Benefits The robust tool steel bases provide a solid foundation, ensuring stability during measurements, preventing any unwanted shifts or inaccuracies Meticulously ground and micro-lapped measuring rods guarantee precise and reliable measurements every time The sleek satin-chrome finish on the sleeve and thimble not only adds a touch of elegance but also enhances durability, protecting against corrosion and wear Effortlessly customise your calibration with adjustable rod diameters (.157in. or 4mm), allowing you to adapt to various measurement needs and ensuring consistent accuracy over time The combination of durable construction and wear compensation in both directions significantly extends the lifespan of the measuring tool, providing long-lasting reliability for your projects Notes Accuracy: Rod diameter: 4mm Measuring length per rod: 1" (25mm