/ Saws / PTA & Hand Saw Blades / Hole Saw Arbors / Arbor Extension / A5 * Not actual product image 55145 A5 Extension for A2 and A2E Arbors 55145 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 300mm 12" 13mm 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