【34 Bolt and Nut Identifier Gauge】The HONTAITUO nut and bolt thread checker standard and metric can quickly identify 34 different sizes,the bolt size and thread gauge includes 15 metric sizes(M4 x 0.7 to M16 x 2.0),19 standard sizes(6-32 Coarse to 3/4-16 Fine),8 Drill Bit Gauge with both imperial and centimeter rulers  

【Excellent Quality-Durability】The bolt size and thread gauge is made of aluminum alloy 6061.nut and bolt thread checker surface is anodized to prevent rust and corrosion.thread size checker.  

【Easy to use and carry】The thread gauge has double holes on the top of the thread gauge,which makes it easy to hang on the wall and saves you a lot of space.Thread checker standard and metric are dimensionally accurate and help you quickly identify threads, nuts, screws and drills,equiring just 2-3 seconds to confirm the type of bolt or nut,saving you a lot of time.  

【Laser Etching-Readable and Accurate】All of the dimensional markings on the nut and bolt thread checker are laser-etched making the numbers very accurate and easy to read,and bolt size and thread gauge won't come off even after repeated heavy use.  

【15 Metric Thread Sizes】4mm x 0.7 - 5mm x 0.8 - 6mm x1.0 - 7mm x 1.0 - 8mmx 1.0 - 8mm x 1.25 - 10mm x 1.0-10mm x1.25 - 10mm x 1.5 - 12mm x 1.25 - 12mm x 1.5 -12mm x 1.75 - 14mm x 1.5 - 14mm x 2.0 - 16mm x 2.0  

【19 Standard Thread Sizes】3/4-16 Fine-5/8-18 Fine,6-32 Coarse,8-32 Coarse,10-32 Fine,10-24 Coarse,12-24 Coarse,1/4-20 Coarse,1/4-28 Fine,5/16-18 Coarse,5/16-24 Fine,3/8-16 Coarse,3/8-24 Fine,7/16-14 Coarse, 7/16-20 Fine,1/2-13 Coarse,1/2-20 Fine,5/8-11 Coarse,3/4-10 Coarse  

【8 Different Sizes Drill Gauges】Φ4 - Φ6 - Φ8 - Φ10 - Φ12 - Φ14 - 1/4 - 1/2