you can get a chipper flight from strikemaster. better for dirty ice and reopening old holes. i have 1 just for fishing the red, river ice can be hard on blades. I know guys with the lazers who destroyed the flight redrilling holes in 1 winter in a permanent house. bent the blade mounts.Hello the strike master has no ring on the bottom,Where my old jiffy did and it would redrill holes.My buddy got a Ion auger and noticed it had the ring on the bottom.I will have to check and see if my blades are serated.I have been useing a bar to reopen holes next day.I wondr if u could weld a ring on the bottom?