Fret saw blades also known as wire blades for profile sawing of wood, metal, plastics and acrylics. Fix to a scroll saw handle or an adjustable saw frame to maximize use of snapped blade. To reduce blade breakages, support work piece on a bench pin clamped securely on to a table. Also lubricating blade with silicon release aerosol for smoother cut. Generally fine cut is for metal. Coarse cut for wood and plastic.