Upgraded 57-in-1 Nut and Bolt Thread Checker: This 57-in-1 thread checker includes 38 common nut and bolt sizes (metric M2×0.4 to M14×2.0, inch #2-56 to 3/4-16) and 19 drill bit gauges (6 metric & 13 inch). The all-in-one bolt size finder provides fast and accurate identification for daily fastener work, repair projects, and mechanical tasks
Standard-Compliant Precision Thread Gauge: This SAE & metric thread checker is manufactured to meet UN, ANSI B1.1 (2A/2B) and ISO 68-1 (6G/6H) standards. With consistent and precise dimensions, it helps reduce mismatched nuts and bolts, improving efficiency for automotive repair, home maintenance, and professional projects
Clear & Durable Laser-Etched Markings: High-contrast laser-etched markings on this thread gauge ensure easy reading in garages, workshops, and job sites. Built-in inch and metric scales support quick bolt length measurement. The wear-resistant, long-lasting markings avoid fading for reliable daily use
User-Friendly, Portable & Wall-Mountable Design: This lightweight, compact nut and bolt thread checker is easy to carry and store. Pre-drilled holes allow wall mounting for fast access in workshops and garages. The portable design fits workbenches, toolboxes, and is ideal for on-site repairs and mobile mechanical work
Versatile Thread Gauge for Wide Applications: This bolt and nut identifier gauge is a must-have tool for DIY enthusiasts, mechanics, maintenance workers, and professional tradespeople. It works great for automotive repair, home improvement, woodworking, metalworking, and general fastening jobs, making it an essential addition to any tool kit

57 Pcs Nut and Bolt Thread Checker - 21 Standard + 17 Metric Thread Gauges