Once again, Blackie created something so original; could not categorize it or accurately describe it. You just have to put it in someones hand and let them try to grasp, the genius that had come from his mind. This knife when deployed locks the blade secure as a fixed blade. When you want to carry it, simply depress the button in the handle, pull the blade out of the handle and turn it around and insert it back into the handle for safe secure carry and storage. The knife blade comes completely out of the handle when going from stored/closed to deployed/open. It is ultra light and can be easily carried anywhere.