Partially removed 12mm X 1.25 bolt blind hole (not through) on tractor platform gearbox. I was afraid the tap would cut too much thread and since it had to go through the staple first I was afraid it wouldn't cut straight. Nothing to stick in a vise! This pup had the bolt hole threads straightened out and cleaned (tools removed everything!) in 10 minutes. Saves a lot of work and stress and potentially $$. Best $35 I Spent On Sundays In A Month!
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