DeWalt DT207 Multi-Tool Blades - DEWALT DT20708-QZ, This 100mm multi-tool semicircle blade from DeWalt is specifically designed for cutting wood with nails, drywall and PVC.
It has 22 TPI, is quick and easy to change, and fits all common oscillating tools.
DEWALT DT20708-QZ Multi-Tool Semi Circle Blade 100mm