Armeg Auger Bit 25mm x 235mm Long. Hex shank for use in rotary machines with 3 jaw chuck holding system. Starrett A1 quick hitch arbor drill bit 6.35mm (1/4 Inch) steel pilot drill & 8.75mm (11/32 Inch) hex shank Fits hole saw diameters 14-30mm (9/16 Inch - 1.3/16 Inch) If you just need some help, would like to take advantage of our Price Promise or perhaps have a large order to place. Give our team of professionals a call on 0203 994 5470, drop us an email at [email protected] or use our Contact Form.