Starrett Dual Pitch Professional Hole Saw, Dual Pitch Professional, 3 in Diameter, 1-5/8 in Cutting Depth, 4 to 6 TPI, 1/2-20 Arbor, HSS/Bi-Metal Cutting Edge, Steel Body, 35 to 220 rpm Speed, 3/8 in, 1/2 in Chuck, Use Arbor: A1/A4, Yellow, Applicable Materials: Non-Ferrous Materials, Metal, Stainless Steel, Wood, MDF, Formica, Plastic, Acrylic, Suspended Floor, Fiberglass and Plaster