Upper Lower Knives, Sewing Machine Blade Multi-Function Household Overlocker Upper Lower Knife Set for SingerExcellent Workmanship---High-quality steel makes it strong and durable, and has a long service life. Corrosion resistance, smooth and without burrs, high strength and durability.Greatly Efficiency---Sewing machine knives help create many professional sewing processes and save a lot of time, thereby greatly improving efficiency.Replacement Accessories---Easy to install and easy to use, replacement for the old or the bad.The product possess reasonable size, light weight, easy to store and carry.High Quality---The multi-function Overlocker knife is made of stainless steel of high-quality. So the overlocker knife is strong and durable. And the household Overlocker sewing machine blade has a long service life. Replacement--All the sewing machine blades are the replacements for the old or the bad blades, besides, all the multi-function overlocker knives are easy to install and use. The sewing blades are good sewing machine accessories to make your work more efficient.Color: silverSize: as shownQuantity delivered: 2 piecesW