The Milwaukee Universal Fit Open-Lok 3-Piece Oscillating multi-tool all-purpose variety pack provides you with an assortment of top-performing blades in the three most common cutting applications- metal, wood and nails and hardwood. The set includes a carbide teeth metal blade that lasts up to 50X longer than standard bi-metal blades and can be used in a wide range of metal materials while maintaining longer blade life such as screws, bolts, nails, and more. The titanium charged bi-metal blade has an optimized titanium blend for maximum wear-resistance and up to 15X longer life vs. High carbon steel HCS blades. The bi-metal multi-tool blade is ideal for wood with nails, PVC, and drywall.