Morris Products 13468 Hole Saw Arbor, 3/8" Hex Shank, 1-1/4" - 6" Hole Saw Diameter, 13444 Replacement Pilot Drill Hole Saw Arbor with Snap Pin Feature 3/8" Hex for 1-1/4" - 6" Saws - 3/8" Hole Saw Arbor for any hole saw. Rugged, Heat Treated Steel Arbors Complete with 1/4 (6MM) High Speed Pilot Drill Cuts clean circular holes through steel & wood Built to Stand Up Under Hard High Speed Use Blister Packed