This keychain is not your ordinary keychain it has a hidden compartment that houses four Ninja spikes. The steel mini baton has a black finish that has ridges that conceals where the top and bottom pieces screw together. Not only does it hold the spikes but it can also be used as a blunt force self-defense weapon. Inside there are four black steel spikes that are 4 inches in length and are very sharp. Ninja spikes are also known as Bo-Shuriken, this is a throwing weapon consisting of a straight, iron or steel spike. Ninja Spikes Mini Baton Keychain has a key ring on the end so you can keep it with you at all times.