The DA463S Blast Shroud is designed specifically for .458 caliber firearms featuring precision 1-3/8-24 thread pitch compatibility with hub adapter systems.DA463S Blast Shroud for .458 CaliberHub adapter compatible with 1-3/8-24 thread specificationPrecision-engineered for secure attachmentDurable construction for reliable performanceEssential for shooters using hub adapter systems this blast shroud provides proper blast direction and enhanced shooting experience for .458 caliber firearms.