CMT ORANGE TOOLS OMF-X4 Review

If you own an oscillating multi-tool, you already know how useful it can be for cutting, sanding, and scraping in tight spots where no other tool fits. But the tool itself is only half the story — the blades you fit onto it make the real difference between a clean, efficient cut and a frustrating, slow job that leaves burnt edges and wasted time. Cheap blade sets flood the market, blunting after a handful of cuts or snapping under high-frequency oscillation. A quality set gives you reliable performance across different materials, stays sharp for many projects, and fits your tool with no wobble or play. Whether you are a professional carpenter making plunge cuts into hardwood flooring, a bathroom fitter trimming plasterboard around pipes, or a DIY enthusiast tackling home renovation at the weekend, investing in good blades turns your multi-tool from a novelty gadget into one of the most versatile items in your kit. Knowing what separates a dependable blade set from a throwaway one is the first step to getting the most out of your oscillating tool.

When choosing accessories for your oscillating multi-tool, there is more to think about than whether a blade simply fits the tool's mount. Blade material makes a huge difference: carbon steel blades are affordable and work well on soft materials, but high-speed steel (HSS) and bi-metal (BIM) blades stay sharp longer and can handle tougher jobs like cutting through nails or thin metal. Tooth geometry matters too — Japanese-style toothing has a sharper, more aggressive cut pattern that slices through wood and plasterboard cleanly with less burning, while universal tooth patterns trade some precision for broader material compatibility. CMT Orange Tools is a respected Italian brand known primarily for industrial circular saw blades and router bits. Their range of oscillating multi-tool accessories brings that same engineering precision to the multi-tool format, with an emphasis on blade longevity and clean cutting performance. The OMF-X4 set is their general-purpose 4-piece kit, designed to cover the most common jobs a tradesperson or serious DIYer encounters day to day.

In this review we cover the four blades included in the OMF-X4 set, looking at what each one is designed for, how they perform on different materials, and whether the build quality justifies the mid-range price point. We examine real-world usability — how the blades mount, how they handle plunge cuts, and how long they stay sharp — as well as practical considerations like compatibility across multi-tool brands, the value of having both Japanese-toothed and bi-metal blades in one kit, and how this set compares to budget alternatives and premium competitors alike. If you want to know whether this is the right blade set to keep your multi-tool working at its best, read on.

The CMT Orange Tools OMF-X4 is a 4-piece multipurpose blade set built around two distinct blade types to give you broad material coverage. Two of the blades feature Japanese-style toothing — these are the go-to choice for clean, fast cuts in solid wood, blockboard, plasterboard, and most plastics. The Japanese tooth geometry, with its alternating bevel grind, produces a noticeably cleaner cut edge than standard universal blades and generates less friction-related burning, especially on thicker timber. The other two blades are bi-metal (BIM) construction, which means a high-speed steel cutting edge welded onto a flexible carbon steel body. This gives them the toughness to cut through materials that would destroy a standard blade in seconds — fibreglass, epoxy resins, and soft plastics — plus they can handle embedded nails up to 5 mm in diameter and even cut into porous concrete and light masonry. All four blades use the standard open-back universal mounting pattern compatible with the vast majority of oscillating multi-tools on the market from brands like Fein, Bosch, Makita, DeWalt, and Milwaukee.

What makes the OMF-X4 stand out from cheaper multi-blade sets is the quality of the steel and the precision of the manufacturing. CMT is first and foremost a blade company — they have been making industrial cutting tools in Italy for decades — and that expertise shows in the details. The teeth are laser-cut rather than stamped, which gives them a sharper initial edge and better geometry consistency from blade to blade. The bi-metal blades have a visible weld line where the HSS tooth edge meets the carbon steel body, and the bond is clean and even — a sign that the blade will resist delamination under heavy use. The Japanese-toothed blades have a slightly wider kerf than some competitors, which helps with chip clearance and reduces binding during deep plunge cuts. Each blade is laser-etched with the CMT logo and blade type, so there is no guessing which one to grab mid-job.

In everyday use, the OMF-X4 blades mount securely with no noticeable play or vibration — a common complaint with budget blades that have sloppy mounting holes. The Japanese-toothed blades glide through 18 mm plywood with minimal effort and leave an edge that needs almost no sanding before finishing. On plasterboard, they make quick work of cut-outs for electrical boxes without tearing the paper facing, which is a real time-saver on site. The bi-metal blades truly earn their keep when you hit something unexpected — cutting through a flooring nail embedded in a floorboard, slicing through an old fibreglass pipe, or trimming epoxy squeeze-out from a glue-up. In each case, the blade keeps cutting where a standard carbon steel blade would have lost its edge or snapped teeth. The oscillation transfer is efficient too — you feel less vibration through the tool handle compared to uncoated blades, which reduces hand fatigue during longer sessions.

The set comes in a compact retail pack that is functional rather than fancy — there is no storage case included, so you will want a blade wallet or a small tool box compartment to keep the blades organised and protected when not in use. That said, the packaging includes a clear labelling system so you can identify each blade type at a glance. The four blades cover a genuinely useful spread of tasks: two for clean wood and board cutting, two for tough mixed-material and metal-embedded cutting. Having both types in a single set means you do not need to buy two separate packs, which would cost more and take up more space. The blades are also individually replaceable — when one wears out, you can buy CMT's single-blade packs rather than replacing the whole set, which is a more sustainable and cost-effective approach than throwaway multi-packs.

In terms of physical specifications, the set weighs 289 grams including packaging, and the blades themselves measure approximately 20.5 cm in length and width — standard sizing for full-size oscillating tool blades. CMT manufactures these blades in Switzerland, which carries a reputation for precision engineering and high-quality steel production. The product carries a 5.0 out of 5 stars rating based on customer reviews, though with only one review at the time of writing this is a relatively new listing on Amazon. It ranks at position 562,518 in the DIY & Tools category overall and sits at number 583 in the Oscillating Tool Accessories sub-category, putting it in the specialist segment rather than the mass-market budget tier. For a mid-range blade set from a respected industrial brand, this positioning reflects its target audience — users who know the difference a quality blade makes and are willing to pay a bit more for it. The set is backed by the standard CMT manufacturer warranty.

This 4-piece blade set is ideal for professional tradespeople and serious DIYers who need one kit that handles both clean wood cutting and tough mixed-material jobs with nails, fibreglass, and light masonry.