Specification Brand : M & J Tooling LLC ItemName : New M12 X .5 6g Solid Thread Ring GAGES 12 0.5 GO NO GO P.D.'S = 11.655 & 11.568 - DW33394MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33394MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.