The Gen 2 Series of brakes features a nut that is a separate piece that allows you to install the brake at home. Installations take about 30 seconds and have no hideous crush washers or peel washers to deal with. It is precision machined out of high-grade stainless steel. This brake is meant for Larger barrels that are generally required by the 338 Lapua etc.
Specifications:

Type
Model	Gen 2 Fat Bastard
Dimensions
Size
Material	Stainless Steel
Action
Trigger
Safety
Thread Pattern	5/8"-24 tpi
Finish	Stainless
Bolt Type
Hand
Hammer Type
Capacity