3+1 Utility Knife / Product

3+1 utility knife is to perfectly combine the organic glass cutting edge and the sawtooth on the blade , to achieve the combination of utility knife ,the saw and the organic glass cutting knife.
Normal utility knife will cannot work as a organic glass cutting knife if we accidentally break its very first quarter(and that happens a lot). Nevertheless, it could be used again if we replace the broken ones with the new ones. However, not only is it troublesome to most of us but also it is some kind of waste to some degree.