Festool 204414 Vecturo Starlock Diamond Saw Blade SSB 90, 1-Pack

The Festool 204414 Vecturo Starlock Diamond Saw Blade SSB 90, 1-Pack is a diamond-coated oscillating multi-tool blade built for cutting tough joints and abrasive mineral-based materials. This is a diamond saw blade designed for severing marble, epoxy resin, grout, hard epoxy, and cement joints. Model number 204414. If your work involves tile repair, grout removal, or cutting into hard joint material without beating up a standard tooth blade, this is the accessory made for that job.

The big story here is durability. Festool calls out the premium-quality diamond coating because that is what makes this blade useful in materials that quickly wear down ordinary blades. Instead of relying on teeth, the cutting edge is made to grind through hard joint material in a controlled way. For installers, remodelers, and tile repair work, that matters because the blade stays useful longer in abrasive applications where a typical blade would lose performance fast.

The 90 mm diameter gives you a broad working edge that makes sense for seam and joint work. On the job, that helps when you need to track along grout lines, clean out damaged sections, or open up hard filler material with control. It is large enough to cover ground efficiently, but still sized for the precision you expect from an oscillating multi-tool accessory.

Fitment is another strong point. This blade uses the Starlock Plus interface, which is the right connection for the Festool OSC 18 and is also listed as compatible with all brands of oscillating multi-tools that use a Starlock chuck. That gives you flexibility if you run multiple tools on site. More importantly, Starlock Plus fitment helps keep the accessory locked in place under load, which is exactly what you want when cutting abrasive material that puts more stress on the accessory than general wood or drywall work.

Festool and outside retailer data both position this blade for mineral and resin-based joint cutting, not general-purpose demolition. That distinction matters. This is not the blade you grab for framing lumber or nails. It is the right choice when you need an oscillating blade for grout removal, marble joint work, cement joints, or hard epoxy seams and you want cleaner control than a larger grinder-style tool can give you.

Build-wise, the blade is described as extremely durable and robust, and one supplemental source lists a bimetal body paired with the diamond cutting surface. Whether you are doing repair work in finished spaces or targeted removal where precision matters more than brute force, that combination points to a blade made to stay stable while the diamond edge handles the abrasive cutting.

If you already own a Festool OSC 18, this is one of those specialty accessories that expands what the tool can do in tile, stone-adjacent, and renovation work. It is especially relevant for tile setters, remodelers, flooring installers, and service pros who need to remove grout or cut stubborn joint material without switching to a larger tool that is harder to control in tight finished areas.

A Specialty Blade That Saves You From Burning Through Standard Accessories

The Festool 204414 Vecturo Starlock Diamond Saw Blade SSB 90, 1-Pack makes sense for one reason: it is built for abrasive joint material that regular blades hate.

• Who it's for: Tile installers, remodelers, flooring pros, and service contractors doing grout removal or cutting hard joint material.
• Why it stands out: Diamond coating, 90 mm circular format, and Starlock Plus compatibility make it a purpose-built oscillating multi-tool blade for mineral and resin-based joints.
• Worth knowing: This is a specialty cutting accessory, not a do-everything blade. If your work is mostly wood or metal, buy for the specific grout and cement jobs where it really pays off.

• What tools does this blade fit? It uses a Starlock Plus interface and is listed as suitable for the Festool OSC 18 as well as compatible with oscillating multi-tools that use Starlock chucks.
• What materials is this blade made to cut? It is intended for marble joints, epoxy resin, grout, hard epoxy, and cement joints.
• What size is the blade? The blade diameter is 90 mm, which is about 3 inches.
• Is this a general-purpose wood cutting blade? No. Product data positions it as a diamond blade for abrasive joint-cutting applications rather than general wood cutting.