5pcs 60° 60 degree summa T summagraphics T cutting plotter vinyl cutter blade pin knife needle

We bought 4 sets of these blades for our Summa cutter they were awful when we went to cut the vinyl the were tearing the edges and cutting very ragged to the point we could not even weed it. I contacted the seller to return them since we had only tried one of the 20 blades and they responded that the return was past the return date. Terrible customer service and terrible product. Do yourself a solid and do not buy thymus product you’ll just be throwing money away.