http://www.gerber-tools.com/Gerber-Ed... The durability of the Gerber Edge series has gotten even better with the addition of the Gerber Edge TacHide Utility Knife 31-000669. The blue TacHide coating is both highly functional and easy on the eyes. The knife is held securely open with a liner lock system. A spring lock on the handle allows the user to change out standard or contractor blades with minimum fuss. A clip is included for convenient carrying.