TIMBERLINE by Amana 185-505 TIMBERLINE 7-1/4X50T TCG 5/8 BOREThis blade is designed for cutting thin non-ferrous products andplastics. It features a 3 or 5 negative hook angle. When cuttingnon-ferrous metals, a coolant or blade wax should be used and properclamping devices employed. Designed to cut: Aluminum, Non-Ferrous Metals & Plastics