/ Saws / PTA & Hand Saw Blades / Hole Saw Arbors / Arbor Extension / KA5-N * Not actual product image 11560 KA5-N Hole Saw Arbor 11560 Other similar products 300mm (12") hole saw arbor extension bar. Suitable for use with any arbor with an 11mm (7/16") shank size. Features Specifications Downloads Contact Starrett Features 300mm (12") arbor extension Specifications Length (mm): 300mm Length (in): 12" Fits Chuck Size (mm): 13mm Fits Chuck Size (in): 1/2" Downloads Starrett Hole Saws (Bulletin 671) Starrett Hole Saw Brochure includes all hole saws, drive arbors, pilot drills, quick change systems sets and accessories Starrett PTA and Hand Tools (Catalog 72) Power tools and accessories and hand tools catalog, including hole saws, hack saws, jig saws, reciprocating saws, measuring tapes, utility knives and a host of specialty products.