Thread Checker is a measuring device that greatly simplifies determining the size of bolts, threads, and similar specifications. It is ideal for mechanics. The main part of the design is made from durable 6061-grade aluminum, which is strong and resistant to corrosion and mechanical damage. The nuts and bolts used for checking and matching are made of SUS 304 steel. A special laser-engraved scale on the bar helps identify various sizes. It offers measurements for 28 major sizes. The template is lightweight, sturdy, useful, and compact.