What's inside
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The best DeWalt multi tool blades depend on the material: use a high-carbon-steel wood blade for clean timber, a bi-metal blade for wood containing nails and light metal, and a carbide or diamond-grit blade for hardened fasteners, cement board, grout, and abrasive remodeling work.
For most homeowners, the most useful starting purchase is a small DeWalt oscillating tool blade kit containing a 1-1/4-inch wood blade, a bi-metal plunge blade, a wider wood blade, and a grout or carbide accessory if the kit includes one. Professionals who cut frequently will usually save money by buying blades by type rather than relying on a mixed pack full of pieces they rarely use.
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Quick comparison of DeWalt multi tool blades
| Blade type | Typical width and plunge depth | Tooth or abrasive pattern | Best applications | Approximate working life |
|---|---|---|---|---|
| High-carbon-steel wood blade | 1-1/4 to 2-1/2 in.; about 1-3/8 in. plunge | Fine to medium teeth, commonly about 14–20 TPI | Clean pine, plywood, trim, drywall, plastic | Several dozen cuts in clean wood, depending on thickness |
| Bi-metal wood-and-metal blade | 1-1/4 to 2-1/2 in.; about 1-1/8 to 1-3/8 in. plunge | Variable or coarse teeth, commonly about 8–14 TPI | Wood with nails, screws, thin sheet metal, pipe | Often 10–30 nail or screw cuts before noticeable slowing |
| Carbide-tipped blade | 1-1/4 to 2-1/2 in.; about 1-1/8 in. plunge | Carbide teeth or carbide grit | Hardened screws, cement board, abrasive composites | Longer than steel on abrasive work; varies greatly by material |
| Diamond-grit blade | About 1-1/2 to 2-1/2 in.; usually shallow plunge | Continuous diamond-grit edge | Grout removal, mortar, tile adhesive | Typically many linear feet of grout, but not a general-purpose cutter |
| Scraper blade | About 1-1/4 to 3 in. wide; no useful plunge rating | Flat sharpened or rigid edge | Adhesive, caulk, vinyl, paint, loose flooring | Can be resharpened in some cases; edge damage is common on hard surfaces |
The dimensions above describe common accessory sizes rather than one specification shared by every DeWalt blade. Check the package before cutting into a deep cavity, especially when plumbing or electrical wiring may be hidden behind the surface.
Choose by renovation task
Clean wood, trim, and cabinet openings
Choose a sharp high-carbon-steel wood blade when the material is free of fasteners. A narrower 1-1/4-inch blade is easier to steer around door jambs, cabinet sides, and outlet boxes. A wider 2-1/2-inch blade removes more material per stroke and is convenient for long cuts in plywood or framing lumber, but it is less nimble in corners.
Fine teeth leave a cleaner edge in thin trim and plywood. Coarser teeth remove material faster in framing lumber but can tear the exit side of a cut. Mark the cut line on both faces when possible, and support the offcut so the blade does not pinch as the piece falls.
Wood containing nails or screws
This is where bi-metal blades for DeWalt oscillating tools are usually the safest choice. Their high-speed-steel cutting edge is welded to a tougher flexible steel body, allowing the blade to tolerate occasional nails and screws better than a standard wood blade.
Bi-metal does not mean indestructible. A hidden masonry screw, hardened structural fastener, or repeated contact with metal can quickly dull the teeth. If you know the cut will pass through several fasteners, use a blade specifically marked for wood with nails or metal cutting rather than sacrificing a premium wood blade.
Thin metal, pipe, and fasteners
Use a metal-cutting bi-metal blade for copper or plastic pipe, thin steel, drywall track, nails, and ordinary screws. A fine-tooth blade generally starts more smoothly in sheet metal. Apply light pressure and let the teeth cut; heavy pressure creates heat, bends the blade, and can strip teeth.
For hardened screws, stainless steel, cast iron, or repeated metal work, a carbide-tipped metal blade is a better choice. It costs more, but its teeth resist heat and abrasion better. An oscillating tool is convenient for access, not speed: a reciprocating saw or angle grinder is usually more efficient for long metal cuts.
Grout, tile adhesive, and cement board
Carbide-grit blades are suitable for grout and cement-based materials. Diamond-grit blades generally last longer in dense grout and mortar, especially when removing a substantial length between floor or wall tiles. They are not ideal for ordinary wood, and forcing them sideways can damage the abrasive edge.
Set the plunge depth only slightly deeper than the grout joint. Going too deep wastes blade life and increases the chance of contacting waterproofing, backer-board mesh, or the tile edge. Work slowly and keep dust under control with appropriate extraction and protective equipment.
Tooth count, width, and plunge depth explained
Tooth count is a useful shortcut, but it is not the entire cutting specification. Fine teeth, roughly 14–20 TPI, favor control and cleaner thin-material cuts. Coarse teeth, roughly 8–12 TPI, clear chips faster in thicker wood. Variable-pitch teeth balance starting smoothness with cutting speed and are common on general-purpose bi-metal blades.
Blade width affects control. Narrow blades turn more easily and fit between studs or close to a frame. Wide blades are steadier for straight cuts and remove a wider kerf. The kerf is the slot made by the blade, so a wider blade also removes more material and creates more dust.
Plunge depth is the maximum recommended cutting depth, not a promise that every material will cut that deeply in one pass. A nominal 1-3/8-inch blade may cut less in dense oak, metal, or cement board because the tool slows under load. Use a depth stop, tape around the blade, or a shallow first pass when hidden services are possible.
Universal fit and DeWalt compatibility
Most current DeWalt oscillating-tool accessories use a universal oscillating-tool mounting pattern, often described as universal fit or OIS-compatible. These blades fit many DeWalt cordless and corded oscillating tools and many competing tools that accept the same open mounting interface.
Do not assume that “universal” includes every system. Starlock accessories use a different shaped interface and may not fit a conventional universal mount. Some tools also have a quick-change clamp whose opening and washer arrangement must match the blade. Before buying blades for a DeWalt multi tool, compare the mounting illustration on the package with the retaining bolt and flange on your tool.
The mounting hole is only part of the fit. A blade can physically attach yet sit at an inconvenient angle, interfere with the clamp, or have insufficient clearance around the tool head. Tighten the retaining fastener securely, but do not overtighten it to the point of damaging the accessory or tool hardware.
Which DeWalt blade kit offers the best value?
| Your situation | Best starting choice | Why |
|---|---|---|
| Occasional homeowner repairs | Small mixed kit with wood, bi-metal, and scraper blades | Covers trim, nails, adhesive, and small cutouts without a large upfront cost |
| Frequent framing or flooring work | Multi-pack of 1-1/4-inch bi-metal blades plus a few wide wood blades | Uses the fast-wearing general-purpose blades where quantity matters |
| Bathroom or kitchen renovation | Bi-metal blades plus carbide-grit or diamond-grit grout blades | Handles fasteners, adhesive, grout, and cement board |
| Precision trim and cabinetry | Fine-tooth narrow wood blades | Better steering and cleaner cuts in visible work |
| Heavy metal or abrasive materials | Carbide-tipped metal blades bought individually | Higher purchase price is justified when ordinary bi-metal teeth fail quickly |
General market pricing varies by pack size and coating, but mixed entry-level packs are commonly in the roughly $15–$35 range, bi-metal multipacks around $25–$60, and specialized carbide or diamond accessories often about $15–$40 per blade. A cheap kit is not automatically good value if half its blades are unsuitable for the jobs you do.
For example, suppose a $30 four-blade kit provides two useful bi-metal blades, one wood blade, and one scraper. If each useful cutting blade completes 15 nail-filled cuts, the effective cost is about $1 per productive cut before counting the scraper. A $45 pack of six premium bi-metal blades that averages 30 comparable cuts costs about $0.25 per cut. The second pack costs more initially but can be cheaper for a remodeling contractor or anyone cutting through fasteners every week.
Ownership, maintenance, and common mistakes
- Inspect teeth after hitting a nail, screw, or masonry edge. Missing teeth and a blue heat mark indicate that the blade should not be pushed harder.
- Brush wood dust from the mounting area and wipe resin from the blade after use. Debris between the blade and flange can cause wobble.
- Keep blades dry and separate carbide or diamond accessories from loose metal tools that can chip their edges.
- Do not twist an oscillating blade sideways while it is buried in a cut. Side loading is a common cause of bent blades and damaged teeth.
- Use the shortest blade that reaches the job. Excess exposed length vibrates more and makes plunge depth harder to control.
- Let the tool oscillate at an appropriate speed. Lower speed helps with heat-sensitive plastic; moderate or high speed is usually more productive in wood, provided the blade is not overheating.
Bottom line
For most buyers, the best DeWalt multitool blades are not one universal design but a small, task-matched collection: fine-tooth wood blades for clean trim, bi-metal blades for wood with nails and light metal, and carbide or diamond accessories for abrasive renovation materials. Confirm the mounting interface, select a blade width that matches the required control, and treat plunge depth as a limit rather than a target. That approach produces cleaner cuts, fewer ruined accessories, and better value than choosing the largest dewalt multi tool blade kit solely by piece count.