This 5/8x24 HUB Direct Thread Mount will convert HUB compatible suppressors to a direct thread mounting system. To install, simply remove your existing mount mechanism from your suppressor and thread on the HUB Direct Thread Mount using a 3/4-inch open end wrench, then thread the suppressor onto your barrel.Key FeaturesMaterial: Constructed from 17-4PH heat-treated material with a black oxide finish.Mounting Threads: Features 1.375-inch-24 mounting threads for compatibility with HUB suppressors.Bore Size: Designed for a .45 caliber bore.Weight: Weighs 1.7 oz for lightweight application.