18mm x 50mm DOC Long Reach Annular Cutter Hougen Pilot 8.0mm Use Pilot 10528 2830880 but can easily be milled

but can easily be milled or sawcut larger for chucks with wider jaws

However it is not guaranteed that they will not fail

2 Flute Ball End Micrograin Solid Carbide Endmill

With 8mm shank

2 x flat scraped face with vee

18mm x 50mm DOC Long Reach Annular Cutter Hougen Pilot 8.0mm Use Pilot 10528 2830880 but can easily be milledHougen 18mm Long Reach Annular Cutter Pilot 8. 0mm For use on Portable Magneticnetic Drills and in materials up to 275 BHN. Made of hardened, high speed tool steel and precision ground, cutters feature a 3 4" diameter shank and have a cutting depth of 50mm. Plus, modified end tooth geometry for stacked plate drilling is available. "12,000 Series" Annular Cutters are resharpenable. Uses 4. 5mm Pilot Pin