Starrett Bi-Metal Deep Cut Hole Saw with Abrasion Resistant HSS Teeth - Ideal for Cutting Metal, Steel, and Wood - 4" (102mm) Diameter, 2" Depth - DCH0400-G: Amazon.com: Tools & Home Improvement
Starrett KA19 Hole Saw Arbor | Dynamite Tool
L.S. Starrett A10-E Hole Saw Drive Arbor with Extended Length 1/4 Inch HSS Pilot Drill - 11/32 Inch Hex Shank - Screw thread 5/8 -18 Inch- Arbor suitable for use with MPH Hole Saws 11934