While drilling out 1 of 3 broken bronze screws that sheared off from one of the swim platform brackets, the cobalt drill bit caught an edge and snapped off inside the hole. Tried drilling that out with a slightly larger cobalt bit but it quickly went dull with no apparent progress made.

Outside of simply putting West System over it and drilling a new hole, anybody got any nifty tricks for removing a broken drill bit that still has part of the screw behind it? Was thinking of getting a punch and whacking the ba-Jesus out of it, but thought that may do more damage to what is still holding screw in. Appears there may be an encapsulated metal sheet with threaded holes that swim platform bolts pass thru on stern.

Also - I cannot get at hole from inside boat - the fuel tank is about 2 inches away from stern where this screw passes thru - so can't attack from that side. Thanks Guys - Scott