M.K. Morse®, AV18, Hole Saw, Heavy Duty, Series: Master Cobalt®, 1-1/8 in Diameter, 1-1/2 in Cutting Depth, 5 TPI, 1/2/2020 Arbor, 1/4 in Dia x 3-1/16 in L Drill, M3 HSS Cutting Edge, Bi-Metal Body, Positive Rake Cutting Edge, Hex/Round Shank, 1/4 in, 3/8 in, 7/16 in Hex, 1/4 in Round Shank, Use Arbor: M24, M24K, M34, M44 and M44K, Applicable Materials: Wood, Plastic, Machinable Metal, Stainless Steel Alloy and Nail Embedded Wood