The kit includes a variety of springs necessary for AR-15 lower receiver maintenance, such as bolt catch, buffer retainer, trigger, hammer, disconnector, magazine catch, selector, and detent springs.
Each type of spring comes in a quantity of 20, making it suitable for department armorers, gun shops, or anyone dealing with multiple AR-15s.
It comes with a clear plastic tool box with a snap lid and separate compartments for organized storage of the different springs.