The AJC Super Shear, made from lightweight aluminum for durability and weighs only 16 lb, with a 21” cutting blade. It is extremely effective at cutting a variety of materials, including thick laminate shingles, and even some soft metals. It employs a patent pending spring-loaded shear tension adjustment that allows the user to adjust the amount of contact pressure between the cutting blades for different materials, less pressure for thin/soft and more pressure for thick/tough. The fence is adjustable to hold shingles for almost any cut. The blades are made of alloy steel and are replaceable. Built in scales measure length and roof pitch angles, the attached bracket and rubber feet provide rooftop stability.