This mag base cutter with 10 cutters is an extremely good purchase. Ihave had it for 6 months noww and cut well over 1000 holes and mostly with 3 or four particular cutters, so if you make sure the mag is fully secure and use the coolant resivour correctly, the cutters are very good. Just recently i dropped the machine and it broke the spindle and Vevore sent me another from China and i replaced it and it works as good as new, this is excellent value.