A band saw of a saw machine, which cuts metal as a material for construction or mechanical parts, is usually disposed after use for a long period of time. According to the present invention, the band saw can be reused to be a product. A knife of the present invention is manufactured with a wasted band saw, a disposed material. A grip of the band saw and a cylindrical pipe are welded to be assembled. A blade can be easily obtained from the band saw treated with heat. The knife can be provided at a low price because the disposed material is used.COPYRIGHT KIPO 2014본 발명은 건축자재 또는 기계부품의 재료가 되는 금속을 자르는 톱기계의 띠톱날로서 장기간 사용시 폐품이 된다.이것을 상품화 되도록 재활용 하는 작업이다.
