This is a back plunger, dial indicator with bezel ø 40 mm. It is ideal for use in applications where space is limited. Back Plunger type dial indicators are suitable for mounting onto leveling machine tool tables or inspection jigs, and for use in situations where standard dial indicators are difficult to read. Model 1960A, which uses Mitutoyo's proprietary shock-proofing mechanism, has excellent durability and shock resistance.