The Bernina Overlocker Upper Knife 5020100594 is one we supply most often. It fits an older range of models, so is more likely to wear out. Sewing across pins and thick sequins will often cause damage. If you make a lot of dance costumes covered in sequins or pearls etc. Or maybe you line up a dozen pins on dozens of outfits, and then sew over them all. Well, somethings gotta give – and eventually it will be your knives. Remember there are two, upper & lower. Always best to change the pair. Fit a new one, but the old one is chipped and damaged. Chances are it will chip and damage the new knife before too long. This Bernina Overlocker Upper Knife will fit the following models, oo4 – 008 334 335 1100 2000
