118-102 Sheet Metal Micrometer, Ratchet Stop, 0-25mm Range, 0.01mm Graduation, +/-0.004mm Accuracy, 160mm Throat Depth

The 118 series sheet metal micrometer has a deep-throated frame for measuring thickness of sheet metal, paper, plastic, or rubber parts, and a vernier scale in metric units for taking precise outside diameter (OD) measurements. A ratchet-stop mechanism helps provide uniform pressure for precise, repeatable measurement.

The micrometers frame has a baked enamel finish for protection and durability. The vernier scale on the thimble and sleeve is graduated to 0.01mm, depending on the model, with a satin chrome rust- and glare-resistant finish. The measuring faces are carbide-tipped for wear resistance. A spindle lock helps provide secure locking of the measurement position. The micrometer comes with a plastic case for storage.

Micrometers are precision measuring instruments that use a calibrated screw to measure small distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot.