This is the original Shingle Shear made in the USA. The blades on the unit cut good and are sharpenable. Comes with a new set of blades, a rip fence, and instructions. The blades last a long time without sharpening and the upper blade can be sharpened multiple times. With a set of new blades as well you will not have to worry about blades. A demonstration video can be viewed at howardtools.com.