Review on Greenlee DTAP10 32 Combination Drill 10 32NF by Sean Maples

This combo drill and tap bit got the job done in mild steel electrical boxes, but be careful as sometimes part of the steel box fused into one part appears to be the tap and it is very difficult to remove this piece of steel. We also tried line oil and that didn't help much, but the problem persisted. This could happen with any tap, but we used it because it was easy to drill a pilot hole and tap a thread in the same operation.