Lenox 1772018 Speed Slot 4-1/8 Inch Bi-Metal Hole Saw

Key Features;Improved metal cutting performance;Increased wall thickness improves durability and minimizes tooth loss;Optimized tooth design penetrates metal with ease;Larger sharper teeth remove more wood for fast cutting;Easy plug removal;Staircase design for fast easy plug ejection;50% longer life;2X more durable;Long lasting fast cutting and versatile. Plug removal as easy as 1-2-3. Speed Slot features a staircase design for easy plug removal. Enhanced tooth geometry a thin kerf design and an advanced coating contribute to the efficiency of the cutting process for up to 2x life in metal cutting. Thick backing plate with holes for drive pins resists damage due to high torque.