Top 5 Cordless Oscillating Multi-Tool Blades for Demolition and Finishing in 2025

Oscillating multi-tools have become a staple on jobsites and in workshops, offering unmatched versatility for cutting, sanding, scraping, and grinding. But the tool itself is only half the equation—the blade you choose determines whether you get a clean finish or a rough, time-consuming cut. In 2025, blade technology has advanced significantly, with new materials and designs that improve longevity, cut speed, and precision.

Whether you are a professional contractor tackling heavy demolition or a DIY enthusiast working on fine trim, selecting the right blade can save hours of labor and reduce tool wear. This guide covers the top five oscillating multi-tool blades for demolition and finishing, highlighting key features, best-use scenarios, and compatibility with Milwaukee's M12 and M18 platforms. We'll also look at essential accessories like the SHOCKWAVE Impact Duty Alloy Steel Drill, Drive and Fastening Bit Set with PACKOUT Accessory Case (75-Piece) that complement your multi-tool setup.

1. Bi-Metal Blades for Heavy-Duty Demolition

When you need to cut through nails, screws, or thin metal studs, a bi-metal blade is your best friend. These blades combine high-speed steel teeth with a flexible carbon steel body, offering durability and resistance to breakage. In 2025, top brands like Milwaukee have refined their bi-metal designs with variable tooth geometry that reduces vibration and increases cutting speed.

For demolition work, look for blades with a tooth count between 10 and 20 TPI (teeth per inch). Lower TPI blades cut faster but leave a rougher edge, which is fine for removal tasks. The Hole Dozer General Purpose Bi-Metal Hole Saw Set (28-Piece) is a great companion for cutting larger openings after initial demolition, ensuring clean, round holes in wood and metal.

• Best for: Cutting nails, screws, thin metal, and wood with embedded fasteners.

2. Carbide-Grit Blades for Abrasive Materials

Carbide-grit blades are essential for cutting hard, abrasive materials like cement board, tile, fiberglass, and stainless steel. Unlike toothed blades, these use tungsten carbide particles bonded to the edge, which grind through material rather than shearing it. They are ideal for plunge cuts in backsplash tile or trimming fiberglass panels.

In 2025, new manufacturing techniques have made carbide-grit blades last up to three times longer than earlier versions. They also produce less heat, reducing the risk of melting or chipping the workpiece. For finishing work, pair your multi-tool with a precision blade for flush cuts in door jambs or baseboards.

• Best for: Tile, cement board, fiberglass, stainless steel, and other abrasive materials.

3. High-Carbon Steel Blades for Wood and Drywall

High-carbon steel blades are the go-to choice for clean, fast cuts in soft materials like wood, drywall, and plastic. They are typically less expensive than bi-metal or carbide blades, making them a good option for high-volume cutting where blade wear is expected. In 2025, many high-carbon steel blades feature ground teeth for sharper, more consistent cuts.

For finishing work, choose a blade with 20 to 32 TPI for smooth, splinter-free edges. These blades are perfect for cutting door jambs for flooring installation, trimming baseboards, or making precise plunge cuts in drywall for electrical boxes. To keep your multi-tool running efficiently, ensure your battery is fully charged. The M12 12-Volt Lithium-Ion XC Extended Capacity 6.0Ah Battery Pack provides extended runtime for longer cutting sessions.

• Best for: Softwood, plywood, drywall, plastic, and light demolition.

4. Specialty Blades for Grout and Thin Metal

Removing grout is one of the most tedious tasks in tile work, but a dedicated grout removal blade makes it quick and precise. These blades are typically made of carbide or diamond grit and are designed to cut through hardened grout without damaging adjacent tiles. In 2025, diamond-grit blades have become more affordable and offer longer life than traditional carbide versions.

For cutting thin metal like copper pipe or aluminum angle, a fine-tooth bi-metal blade (24–32 TPI) is ideal. These blades produce minimal burrs and allow for clean, accurate cuts. If you are working on a project that involves fastening or drilling after cutting, the SHOCKWAVE Impact Duty Alloy Steel Drill, Drive and Fastening Bit Set with PACKOUT Accessory Case (75-Piece) provides all the bits you need in a portable case.

• Best for: Grout removal, thin metal cutting, and precision work.

5. Diamond-Coated Blades for Extreme Durability

For the toughest materials—hardened steel, cast iron, porcelain tile, or concrete backer board—diamond-coated blades are the ultimate solution. These blades have industrial diamond particles embedded in a metal matrix, providing exceptional cutting power and longevity. In 2025, diamond blades are becoming more common in multi-tool kits, offering pros a reliable option for demanding demolition.

Diamond blades are best used with a steady hand and moderate pressure to avoid overheating. They are ideal for cutting through rebar-reinforced concrete or removing old mortar. When paired with a high-torque oscillating tool like Milwaukee's M18 FUEL models, diamond blades can handle even the most challenging jobsite conditions.

• Best for: Hardened steel, cast iron, porcelain tile, concrete, and abrasive masonry.

Choosing the right oscillating multi-tool blade for your project can dramatically improve your efficiency and the quality of your work. Whether you are demolishing a wall or trimming door jambs, matching the blade to the material is key. To get started, explore Milwaukee's range of high-performance accessories, including the SHOCKWAVE Impact Duty Alloy Steel Drill, Drive and Fastening Bit Set with PACKOUT Accessory Case (75-Piece), which pairs perfectly with your multi-tool for a complete cutting and fastening solution.