Review on CTH4000 Carbide Tipped Carbide Drill by Drill America by Michael Hughes

I needed to cut some 4" holes in a new data cabinet and this pup did it like a badger in heat. The edge at the tip of the drill prevents it from breaking or falling into the hole. The spring helps with final penetration. Binding and pinching was very minor, and when it was, it could be remedied. Overall a great device and worth the money.