The Faithfull SK7 Wavy Edge Insulation Cutter Blade is perfect for making fast, precise and deep cuts. It is specially designed for cutting insulation board, but can also be used on foam and other soft materials. Manufactured from high-carbon SK7 steel for a long life. Compatible with many multi-function, oscillating power tools. Specification: Cutting Length: 100mmWidth: 8-28mmMaterial: SK7 blued steel