You are Buying a brand New And Factory Sealed Dremel Universal 1-1/4 in. Carbide/Bi-Metal/Wood Oscillating Multi-Tool Blade Kit (3-Piece)... 3-piece variety pack for cutting all types of materials - wood, metal, plastic, nails, screws, stainless steel bolts, galvanized pipe, plaster and lathe, cement board, fiber board, sheet metal, slate, and ceramic tile. 3 high-performance blades: high carbon steel blade for wood cutting applications, bi-metal blade for wood/metal cutting applications, and carbide-toothed blade for hard material cutting applications. MM482U: Dremel bi-metal blades in wood with nails provide up to 15X life vs. standard bi-metal oscillating blades in wood with nails. MM485U: high performance carbide teeth provide up to 30X life in hardened material verses standard bi-metal oscillating blades. The Dremel MM488BU is a three-piece oscillating accessory variety pack ideal for precision cutting in a wide variety of materials: wood, metal, plastic, nails, screws, stainless steel bolts, galvanized pipe, plaster and lathe, cement board, fiber board, sheet metal, slate, and ceramic tile.