Fury Tactical SDK2 Self Defense Keychain with Pressure Tip Designed in the USA, with inspiration from the Fury SDK; the top selling force multiplier on the market Handcrafted from lightweight aircraft aluminum making the ideal Self Defense Keychain SDK Spiral "screw thread" grooves for better control and grip; includes keychain loop At 5-1/2" length and only 2 ounces, the SDK 2won't weigh you down The Fury SDK and SDK 2 are often poorly copied so always look for the engraved Fury logo to insure a genuine product; Do Not Purchase Chinese Copies