Although I used to love about 5 years, the cutting edge broke, so I bought again. I loosened the screw of the same equipment as usual, and the cutting edge bent to the licking scissors. There is a possibility that the torque of the screw was too strong, but it was surprising because it bends a lot easily. I adjusted it as plain old with pliers. Since it was the first purchase in about five years, perhaps the material changed ??!?