Archived from the Tools In Action forum (Collector's Resource). This thread is read-only.
I found these heavy duty masonry bits in an old Milwaukee hammer drill case. The logo stamp is “OP” (see pic). Anybody know what brand that is? More importantly, what brand drill will they fit in? The shank diameter is 0.680″ and is smooth, round, no flats.
Very cool find but not sure who makes them.
Thanks! There’s a big crew rebuilding an overpass nearby. Might ask ’em what they fit.