Specification Brand : M & J Tooling LLC BulletPoint1 : [Quenched Processed Thread Plug Gage] The thread plug gage is processed for strong hardness and equipped with a magnetic head. BulletPoint2 : [ Switch Adjustments] Features a switch for easy adjustments to ensure precise measurements. BulletPoint3 : [Check Tool Angle in Metal Turning Lathes] Useful for checking tool angles while cutting threads in metal turning lathes. BulletPoint4 : [Easy to Use and Delicate] Light and delicate design for easy use with precise measurements and sturdy construction. BulletPoint5 : [Applied to Measure Thread and External Thread Tooth Pitch] Ideal for accurate measurements of thread pitch and external thread tooth pitch. Color : #-01 ItemName : New 1 5/16 20 UN 2A Solid Thread Ring GAGES 1.3125 GO NO GO PDS= 1.2786 & 1.2739 - DW31577MSAF ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 6 centimeters ItemPackageDimensions_Width : 6 centimeters ItemTypeKeyword : thread-gauges LampType : electric Manufacturer : M & J Tooling LLC Material : Metal plastic ModelName : Fafeicyx3ps6bw2no-01 ModelNumber : Fafeicyx3ps6bw2no-01 NumberOfItems : 1 PartNumber : DW31577MSAF ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.