Specification Brand : M & J TOOLING LLC BulletPoint : Metric Thread Plug Gage Gauge M4 x 0.7 6H Thread Go and NoGO BulletPoint1 : Precise 44-Size Identification: Our thread checker quickly recognizes 44 different sizes,clear scale markings and accurate bolt and nut size, including metric (M3*0.5 to M24*3.0) and standard (6-32 Coarse to 1-12 Fine). This comprehensive range helps prevent costly mistakes and saves time. BulletPoint2 : Durable Thread Checker: The 44 nut and bolt thread checker is crafted from 6061 aluminum alloy, and all pillars are made of durable 304 stainless steel, and it has a hard anodized surface with rust-resistant threaded pins firmly set in the holes of the identification gauge. The threaded plate has a sufficient thickness of 0.6mm making this tool more durable BulletPoint3 : Clear and Durable Laser Scale: The bolt identifier board is designed with white lettering on a color background, meanwhile, the bolt and nut gauge features laser-etched inch and centimeter scales on the edges, which are clear and easy to compare, and will assist you in quickly and easily identifying the size of your bolts and nut. BulletPoint4 : Versatile Mounting Options: Featuring 3 convenient hanging holes , 2 holes on the top of the thread gauge, and 1 on the bottom of the thread gauge, our nut and bolt thread checker offers versatile mounting options. Hang it on your workshop wall for easy access, or let it sit securely on any surface as you work. You can choose the way you like. BulletPoint5 : [UPGRADE 2 PCS DESIGN] The nut and bolt thread checker is split two-piece design suitable for hanging on the wall or using on the workbench. Compared with the one-piece deign, our nut and bolt checker is more convenient and lightweight. You can take the one you need freely. In the case of the same measurement size, it's also space-saving. Color : Red and Black ExternallyAssignedProductIdentifier1 : 0763508541351 ExternallyAssignedProductIdentifier2 : 763508541351 FinishType : Hard Anodized Hazmat : auto-grounding ItemName : New 7/8 9 UNC 2B Thread Plug GAGE .875 GO NO GO P.D.'S = .8028 & .8110 Quality ItemPackageDimensions_Height : 1.5 inches ItemPackageDimensions_Length : 6.5 inches ItemPackageDimensions_Width : 13.5 inches ItemShape : Rectangular ItemTypeKeyword : thread-gauges Manufacturer : M & J TOOLING LLC Material1 : Aluminum Material2 : Stainless Steel ModelNumber : modle NumberOfItems : 1 PartNumber : CH1231MJ ProductDescription : YOU ARE PURCHASING THE PICTURED THREAD PLUG GAGE.