This 44-piece thread checker set is a new nut and bolt thread identifier for inch and metric sizes, packed in a box for storage and organization. It is useful for matching fastener threads during repairs, maintenance, shop work, or parts sorting, helping buyers identify the correct size before replacing nuts or bolts. Free shipping is included, which can be helpful if you need a basic thread gauge set delivered without added cost. This item may suit DIY users, mechanics, and workshop owners looking for a practical reference tool rather than guessing thread sizes. Check the listing for full details. 44pcs Inch & Metric Set Nut & Bolt Thread Checker Identifier Thread Gauges Box. Condition: New. Listed at 20.99 USD. Quantity: 44pcs. Use the detachable nut and bolt gauges to check, identify & verify nut and bolt size. - Bolt thread checker gauge box can help users to check the sizes of nuts and bolts quickly. Start quickly indentifying and distinguishing thread thickness.