Spyder - Professional Bi-Metal Hole Saws
High-quality bi-metal band combines the flexibility of a spring steel backing with the enormous wear resistance of high-speed steel. Each tooth tip is made of hardened high-speed steel, so they're extremely durable and provide fast, clean cuts in the toughest materials.
Positive and aggressive tooth rake angle - Provides smooth chip clearing in a wide range of applications and materials, for maximum penetration and fast, deep cuts.
Variable Pitch and Set - Excellent chip clearing in deep-cutting applications and evenly distributed cutting load helps ensure smoother cutting and longer tooth life.