iFixit iMac Opener/Knife
The unique design of the latest iMac models requires you to cut through the foam tape on the display to get inside. The handle is made of reinforced nylon and easily fits the cutting wheel while providing great traction. In addition, on the back of the handle there is a thin blade for prying and cutting, which allows you to loosen all the glue. The cutting wheel is specifically designed to slide into the hair-thin gap between the display and the aluminum frame, then easily cut through the foam that connects the two.