The Milwaukee® universal fit OPEN-LOK™ 1-3/8 in titanium enhanced carbide teeth extreme material blade 2 PK is designed for oscillating multi-tools. it has a unique aggressive tooth design that offers optimal cutting performance in wood, screws, metal pipe, nails, cement board, plaster and more. The 1-3/8 in titanium enhanced carbide teeth extreme material blade lasts up to 50X longer than standard bi-metal blades and can be used in a wide range of materials for the longest blade life. The unique, aggressive carbide tooth design offers faster cuts and better cutting performance in wood when compared to standard carbide blades. These Milwaukee® multi-tool blades are designed and made in the USA with global materials. Milwaukee® Blade Set, 2-Piece End Cut, Series: OPEN-LOK™, For Use With: Oscillating Multi-Tool, Specifications: 1-3/8 in, Carbide, Black Oxide