2X more durable with 50% longer life than previous LENOX hole saws Includes the most commonly used hole saw sizes Increased wall thickness improves durability and minimizes tooth loss Optimized tooth design penetrates metal with ease Large, sharp teeth for fast cutting and SPEED SLOT staircase design for easy plug ejection Kit contains 7/8", 1", 1-1/4", 1-3/8", 1-1/2", 1-3/4", 2-1/8" hole saws; and 5L 3/8" and 6L 3/8" standard arbors