Measuring and Inspecting Category Skip Navigation or Skip to Content Measuring and Inspecting Indicators, Holders & Accessories Tools or accessories used for various inspection and measuring tasks including measuring runout, comparing parts, or measuring tool feed distance and more. 1-2-3 Blocks 1-2-3 Blocks are a common shop set up tool thanks to their versatility, they can be used to calibrate equipment, space your jobs, collect measurements, or support your work. Caliper Tool used to measure the various dimensions of an object. Pin GagesUsed to measure tolerances for bores and holes. Can also be used to test measuring equipment Inspection Sets Tool sets used to check dimensions or other part specifics, facilitate part inspection, or doing layouts and set-ups.