Steel

Outside micrometers are used for measuring the thickness or outside diameter of small parts or fittings with high accuracy. Similar in appearance to a C-clamp, the object to be measured is clamped between the anvil (the stationary end of the clamp) and the spindle (the moving part of the clamp). The clamp opens and closes by turning an internal screw. On analog micrometers, measurement is calculated by reading the lines and numbering system that appears on the thimble and sleeve.

Drill bushings or drill guides are installed into a drilling jig to guide, support, and position a drill or other cutting tool during metalworking tasks.
Also known as drill guide bushings, or drill jig bushings these machine tools and their accessories work well with your end mills, and digital micrometers.

Reid Supply is a full line distributor from the top manufactures, the most common types of Drill Bushings are fixed or press-fit bushings, head press fit, threaded drill bushings, united and metric drill bushings.

Telescoping gauges are measuring devices used with a micrometer to measure the internal diameter of holes, bores, grooves, slots, etc.