Diablo Automatic Knife Black Satin Plain. The Diablo is a side button folding automatic Knife. It comes with carbon fiber inserts in the aluminum handle and a black Wharncliffe D2 steel blade. Has a sliding safety switch to prevent accidental discharge. overall length is 8.25 inches with a blade length of 3.5 inches. Comes with a pocket clip. These knives are very well made with no blade wobble and a very strong snap of the blade with the push of the button. You cant beat it for the price. This knife will last you a long time. overall length is 8.25 inches with a blade length of 3.5 inches. Comes with a pocket clip