Roof Pitch Finder - Easily Measure Slope, Angle, & Roof Pitch Pitch Finder includes a clear polycarbonate lens that exposes the sealed indicia and the needle. The tool functions completely through gravity, so no batteries or maintenance is required. Portable and lightweight for easy carrying up ladders for use at higher elevations. Can be used on all roofing materials, accurately calculate Roof Pitch, Degree and % of Slope. Constructed of sturdy polystyrene