JANCHI 3 piece replacement blade set that includes a general purpose blade and a curved blade and a metal cutting blade. The general purpose blade and curved blade are made of high quality HCS material that can cut through wood and plastic with ease. The metal cutting blade is made of BIM D6A + M42 material that can handle metal materials better and last longer. Whether you need to cut small trees, wood, copper pipe, conduit, trim, or metal, these blades can handle it. They are versatile and useful for cutting small projects around the house or outdoors. These blades are easy to switch and use, and compatible with Black and Decker Jigsaw Navigator models (PHS550B and SC500 ). If you know someone who owns a Black and Decker saw, this is a perfect gift idea for them. They’ll appreciate having extra blades on hand for their next project. Replacement Electric Hand Saw Blade Combo Set, Compatible for BLACK+DECKER SC500/PHS550B Navigator Saw, Wood Metal Plastic Cutting Blade 3-Piece