/ Saws / PTA & Hand Saw Blades / Hole Saw Arbors / "Oops" Hole Enlargement Arbor / KA19-N * Not actual product image 11556 KA19-N ''Oops'' Hole Saw Arbor 11556 Other similar products Hole enlargement arbor. Replaces the pilot drill in any A1, A2 or A10 type arbors. Features Specifications Downloads Contact Starrett Features Replacing the pilot drill, the A19 allows diameters to be enlarged by attaching a saw of the same size to that of the existing hole. This saw then acts as the pilot for the larger diameter saw that is attached to the arbor in the normal way. Specifications Fits Arbors: ALL Downloads Starrett Hole Saws (Bulletin 671) Starrett Hole Saw Brochure includes all hole saws, drive arbors, pilot drills, quick change systems sets and accessories