STANLEY FatMax 10-789 Twin Blade Utility Knife

I use this extensively for roofing. The ease in shifting between a carbide-edged straight blade and a large hook blade saves me time and energy. The handle grip is easy on my large hands and the changing of blades could not be easier. Being able to carry nine blades (I carry four hook and five straight) plus the two in the ready position; always enough to get me through sever days on the roof. I would highly recommend this utility knife for anyone who needs to shift between blades. My fellow roofing friends all get their own after using mine. (My name is brightly painted on the knife so it doesn't get "lost."

I'm a Carpenter by trade but I also do roofing and a number of other jobs and this knife is my constant companion. The straight blade is amazing all around all purpose kind of blade for sharpening pencils to slicing tyvek, and the curved or claw blade slices through shingles like butter. There is a compartment in the handle which allows you to store blades for the quick change out of blades at the drop of a hat. I absolutely love this knife. It will save you time and money on the job keep one in your pouch and you will see what I mean.