I bought my first JMR notcher over 15 years ago and now have 4 in our commercial shop we even have the smaller ones in each of our field service trucks. This thing is built like a Swiss watch, The machine work looks like something out of a Formula 1 car or Aero space. Unlimited angles and the ability to clamp on an existing vertical pipe to install hinge pins make invaluable to us!!!! We have tried other notchers (regrettably) and there lack of rigidity tears up hole saws immediately. THERE IS NO BETTER NOTCHER PERIOD!!!!