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, perfect 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.Perfect Replacement--All the sewing machine blades are the perfect 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 piecesWarm prompt:1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering.2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding3. Only the above package contents, excluding other products.