To close the blade on your Curve - Blue multitool, you'll need to disengage its locking mechanism. Here's how: Locate the Locking Mechanism: The Curve features a sliding lock bar on the side of the tool. This bar secures the blade and other implements when they're open. Disengage the Lock: Using your thumb or fingernail, slide the lock bar away from the base of the blade. This action releases the blade from its locked position. Close the Blade: While holding the lock bar in the disengaged position, carefully fold the blade back into the handle.