Metric Imperial Bolt Nut Gauge Tool Wear Resistant Precise Nut Bolt Thread Checker for Plumber Machinist and Handymen Highlight description: Detachable : The required thread gauge can be easily removed , and nuts or bolts can be screwed into the thread gauge to quickly identify thread sizes . When performing thread inspection in tight areas or visiting a hardware store for missing bolts or nuts , it is more convenient and faster than manual measurement of dimensional inspection Set Contents : 50 piece set of nut and bolt thread detectors in 27 imperial and 23 metric , each thread detector inserted into a black storage case with foam storage rack 3 Methods : There are three ways to read the size , the engraved size on the thread gauge , the printed size on the label and the screen printing size on the foam . Each size printed on the label chart and foam corresponds to the thread gauge size , allowing for a clearer and more visual view of the dimensions and removal of the corresponding gauge when a thread inspection is required Product Construction : Our nut and bolt thread gauge kit is made of aluminum alloy . Each thread detector has a red or blue oxide layer and uses engraving technology to make it wear resistant , legible , and easy to read . For many professionals or DIY enthusiasts , this set of nuts and thread gauges is a must have tool and present Function : The bolt and nut detection gauge has 50 male/female threads , which can not only help you solve the bolt and nut problems encountered in daily mechanical work or household projects , but also quickly help you sort out the mixed bolts and nuts , and there is a tool box to store to avoid loss Detailed description: Description : Constructed from aluminum alloy , this bolt nut gauge is designed to be robust and wear resistant , suitable for everyday use . Its adaptable design meets a range of measurement needs , boosting productivity in any workshop or garage setting . Key Feature : Easy Identification : With clearly marked measurements , this aluminum alloy bolt nut gauge allows for quick identification and an efficient checking process . Specification: Product Name: Bolt Nut Gauge Tool Structure: Aluminum Alloy Color: Red Blue Size: 285x230x55mm/11.22x9.06x2.17 inch Unit: Metric/Imperial System Note: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement. Parts List: Red Metric: M2-0.4, M2.5-0.45, M3-0.5, M4-0.7, M5-0.8, M6-1.0, M7-1.0, M8-1.0, M8-1.25, M10-1.0, M10-1.25, M10-1.5, M12-1.25, M12-1.5, M12-1.75, M14-1.5, M14-2.0, M16-1.5, M16-2.0, M18-1.5, M18-2.5, M20-1.5, M20-2.5 Blue Imperial: 1-12, 1-8, 7/8-9, 7/8-9, 7/8-14, 3/4-16, 3/4-10, 5/8-18, 5/8-11, 9/16-12, 1/2-20, 1/2-13, 7/16-20, 7/16-14, 3/8-24, 3/8-16, 5/16-24, 5/16-18, 1/4-28, 1/4-20, 12-24, 10-32, 10-24, 8-32, 6-32, 4-40, 2-56 1 x Plastic Box _x000D_ _x000D_