Mirka Ultimax Ligno 5 Inch Multifit Grip Discs, model UL-5MF-040, are 5 inch hook and loop sanding discs built for aggressive wood sanding. This is a sanding disc designed for wood sanding and material removal. In this 40 grit version, the focus is fast stock removal, surface leveling, and early-stage prep on wood surfaces where you need the abrasive to keep cutting instead of packing up with dust.

What separates this disc from generic orbital sander paper is how the abrasive surface is laid out. Mirka uses an hourglass abrasive pattern with dust channels that direct debris toward the Multifit extraction holes. On the job, that matters because wood dust is what usually kills cutting speed. When dust has somewhere to go, the grains stay exposed longer, the disc runs cleaner, and you spend less time fighting loaded paper.

Heat control is another real advantage here. Mirka states that air circulates under the abrasive, which helps reduce heat during sanding. With wood, especially resinous species or coated surfaces, extra heat can turn fine dust into a gummy mess that clogs the disc and drags the finish quality down. Keeping the disc cooler helps maintain a more even cut and extends useful disc life.

The backing is designed for flexibility and better edge wear resistance thanks to an improved resin system and latex impregnated paper. That is worth paying attention to if you sand edges, profiles, or areas where cheaper discs usually curl, crack, or wear through too quickly. For cabinet parts, furniture components, flooring work, and general shop prep, that added flexibility makes the disc easier to control without giving up durability.

Fitment is straightforward. These are 5 inch grip discs with a hook and loop attachment for standard 5 inch orbital sanders. The Multifit hole layout is built to work with dust extraction, which is a big part of why these make sense for anyone sanding wood regularly. Better extraction means a cleaner work area, less airborne dust, and more consistent sanding from disc to disc.

This 40 grit version is the coarse option in the Ultimax Ligno line, so it is best used where speed matters more than finish-ready scratch patterns. Think heavy prep, flattening, stripping back rough material, and knocking down surface inconsistencies before stepping to finer grits. If you do woodworking for a living, build cabinets, refinish floors, or handle frequent wood prep in a remodeling environment, this is the kind of abrasive that earns its keep quickly.

Mirka Ultimax Ligno 5 Inch Multifit Grip Discs Are a Smart Buy for Serious Wood Sanding

If you sand wood often enough to care about disc life, dust control, and consistent cut, this is the kind of abrasive that makes your sander feel more productive instead of just more expensive.

• Who it's for: Woodworkers, cabinet installers, remodelers, flooring pros, and serious DIY users doing real prep and stock removal on wood.
• Why it stands out: The dust-channel design, Multifit extraction pattern, and flexible latex impregnated paper backing all solve the usual problems of clogging, heat buildup, and edge wear.
• Worth knowing: This is the coarse 40 grit version, so it is meant for aggressive removal, not final finish prep. Step down through finer grits after your heavy sanding is done.

• What material are these discs made for? These discs are designed for wood sanding.
• What type of sander do they fit? They fit standard 5 inch hook and loop orbital sanders.
• What does 40 grit mean for use? 40 grit is a coarse abrasive meant for fast material removal, leveling, and early-stage sanding.
• Do these support dust extraction? Yes. The disc uses Mirka's Multifit extraction hole pattern and dust channels to help move dust away from the abrasive surface.