Cat Claw® is easy to install on almost any exposed structure - ledges, beams, pipes, parapets or sills. It can be easily split in the field to make "Kitten Claw" for narrow ledges. Prongs also can be shaped easily for the best results. Cat Claw works on buildings ranging from industrial structures to the clock in the church steeple. And it can be used on surfaces such as wood, metal, masonry, steel, or iron. Cat Claw can be installed vertically or horizontally and on sloped, convex and concave surfaces.