Expensive, but the set pays for itself many times over when drilling panels, troughs and boxes. Work forever instead of constantly buying $10 disposable hole saws. Drilling is also much faster. Follow the RPM instructions and use a light cutting oil and each bit will last 500 holes.
The spring broke off the drill at the first drill hole. I will request a refund. Although it is quite possible that a defective set has come across. The quick change is really cool, along with the case. But I was very disappointed because of the darn ejection spring.
We install Cellflex 7/8 RFS cable at work, on a previous project we encountered a 1/8 inch thick steel plate that we had to cut to pull the cable through. It is difficult to cut this plate. A new place doing the exact type of installation came across the same type of steel plate and bought these cutters for the purpose. Sprayed some coolant on the surface and got started, within seconds the cutter did its job and I wondered why I didn't get it sooner Clean cut in seconds, blades look new Greatβ¦