The Mirka 40-624-040 Coarse Cut 6 in Grip 6-Hole Sanding Disc is a coarse hook and loop sanding disc for fast material removal and surface preparation. This is a sanding disc designed for aggressive sanding on a compatible random orbit sander or similar grip-disc sanding setup. Model Number: 40-624-040.

What matters here is the combination of 6 inch diameter, 6-hole pattern, and P40 grit. The 6 inch size is a common shop and jobsite format that covers more surface area than smaller discs, while the coarse 40 grit is meant for early-stage work where you need the abrasive to cut instead of just refine. If you are removing material, leveling a rough surface, or starting a sanding sequence, this is the kind of grit that saves time.

The grip backing makes this disc practical in real use. You can swap worn discs quickly, move between grit steps without wasting time, and keep your sander working instead of fighting adhesive-backed paper. For anyone doing repetitive sanding, that simple changeover matters more than it sounds on paper.

The 6-hole layout is also important because hole pattern affects how the disc pairs with a sander pad and dust extraction setup. When the hole pattern matches your pad, you get a cleaner sanding process and less buildup on the abrasive. That helps maintain cut rate and keeps the work area more manageable during heavier prep work.

This Mirka sanding abrasive is sold in a 25-pack, which makes sense for users who go through discs regularly. A single coarse disc can disappear quickly when you are doing heavy stock removal, so pack quantity matters for cabinet shops, refinishers, fabrication work, and serious DIY users who do not want to stop mid-project.

If you need a fine finishing disc, this is not that. The Mirka 40-624-040 Coarse Cut 6 in Grip 6-Hole Sanding Disc is for the front end of the sanding process, where speed and cut matter most. It is a smart fit for users who already know they need a coarse hook and loop sanding disc and want a recognized abrasive brand in a standard 6 inch format.

Start Aggressive, Then Work Your Way Down

The Mirka 40-624-040 Coarse Cut 6 in Grip 6-Hole Sanding Disc is the kind of abrasive you buy when you need the first sanding step to actually move material.

• Who it's for: Anyone using a 6 inch grip-style sander for rough prep, stock removal, or stripping the surface down before finer sanding.
• Why it stands out: You get a standard 6 inch format, coarse P40 cut, 6-hole layout, and a 25-pack from a brand that is well known in abrasives.
• Worth knowing: This is a coarse sanding disc, not a finishing disc. Make sure your pad is set up for 6 inch grip discs with a matching 6-hole pattern.

• What kind of abrasive is this? This is a hook and loop sanding disc with a grip-style backing.
• What grit is it? It is P40 grit, which is a coarse abrasive for aggressive sanding and material removal.
• What size sander does it fit? It is a 6 inch disc and should be used on a compatible 6 inch sander or backing pad that accepts grip discs.
• Does it have dust holes? Yes. This disc uses a 6-hole pattern.