This is a very useful tool for installing ANY mag catch, not just the Norgon that I bought it for. I subsequently used it on another build. It is easier than a punch or another button to depress the spring in to install the catch. The little dimple helps get it the the right number of turns in. The tool is made from polymer to prevent marring the finish of the button or receiver. For the cost of this item it is a no brainer - just buy it.
Reviewed by: (Verified Buyer) Daniel Lieneck from Budd Lake.