Lenox 3001717L Bi-Metal Speed Slot Hole Saw 17L 27MM The Lenox 3001717L speed slot hole saw features a patented vari-tooth design which optimizes cutting for fast cuts and long tool life. These hole saws are great for electricians, plumbers, or anyone else for that matter, providing fast, efficient cuts in wood. Features: IMPROVED METAL CUTTING PERFORMANCE: Increased wall thickness improves durability and minimizes tooth loss, optimized tooth design penetrates metal with ease FAST, EFFICIENT CUTTING IN WOOD: Larger, sharper teeth remove more wood for fast cutting EASY PLUG REMOVAL SPEED SLOT: staircase design for fast, easy plug ejection Specification: Diameter: 1-1/16\" Arbor: 1L, 4L or 5L