SPEED SLOT features an extra-tall removal slot with an innovative staircase design that makes plug removal as easy as 1, 2, 3. Enhanced tooth geometry, thin kerf design, and an advanced coating make cutting more efficient. Non-binding coating helps deliver faster cuts. Uses standard arbor size 2L, 3L, 6L or 7L or Snap-Back arbor size 2L, 6L. LENOX Tools SPEED SLOT Bi-Metal Hole Saw, Non-Arbored, 1 5/8-inch (1771964).