FURY Tactical SDK Self Defense Keychain with Internal Knife (Silver)
The Fury 10012 SDK (Self Defense Keychain) from Joy Enterprises with internal knife blade, gives the user a dual option for use. In the closed position, the 4.5 inch control device can be a persuasive tool for pressure points. Add keys to the attached keyring and you can hold your ground. Unscrew the end of the device to reveal a hidden blade that screws back onto the device.