Venturing a guess wouldn't be a good move since a pretty close fit is still not good enough. The slots are designed to work with the chuck and vary even within brands. My thought would be to buy a drill to be compatible with available bits or rent a bigger/w3tcompact/icons/cool.gif machine (less spin more hit) and get the job done quicker using less bits. Bear in mind, if an imported tool is purchased without a UL label, don't stand around in the rain or snow, you could get a shocking /w3tcompact/icons/shocked.gifsurprise!! Most of this work is outdoors! /w3tcompact/icons/smile.gif SteveV