With the Mitutoyo 050084-10 depth base attachment, you achieve precise and repeatable depth measurements using your standard caliper. Easily mounted with the built-in locking clamp screw onto a compatible 100 mm, 150 mm, or 200 mm caliper, it significantly widens your reference surface. Measuring 100 mm in length and 12 mm in width, this base prevents the depth rod from tilting across wide bores or slots. Its finely ground contact face ensures a flat alignment on your workpiece for reliable quality inspections on milled and turned components.