It looks like an ordinary baseball cap. But slip steel inserts into the Sap Cap, and you have a weapon. "Beat on muggers like you are The Skipper and they are Gilligan."
Uh, if someone does use this to beat up a mugger, won't the mugger be able to sue the company for actively encouraging its customers to beat up muggers?!
:D
It's the modern-day Odd-Job hat!