A4 Size Arbor with Pilot Drill Bit by Knightsbridge £2.90 SKU HSARBORS 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Description Specification Description A4 size arbor with 6.3mm high speed pilot drill bit with 9.5mm hex arbor shank Suitable for use with Knightsbridge models HS20MM - HS25MM holesaws Specification Datasheet