The Mirka Iridium 3 Grip 20H 600 sanding disc, model 24-3MH-600, is a 3-inch hook and loop sanding disc sold in a pack of 50. This is a sanding disc designed for fine surface sanding and finish prep. If you run a small random orbit sander or detail sanding setup and need consistent 600-grit discs with a grip backing, this is the kind of consumable that keeps finish work moving without drama.

The 600-grit rating puts this disc in the fine-sanding range, which matters when you're refining an already-prepped surface rather than trying to remove heavy stock. That makes it a practical choice for smoothing between sanding stages, dialing in a cleaner finish, or preparing surfaces where a rougher abrasive would leave more cleanup behind. In plain terms, it is for control and surface quality, not aggressive material removal.

The 3-inch diameter is useful when you're working with smaller tools, tighter profiles, or parts that do not need a larger disc. A smaller sanding disc gives you better access and a bit more control on compact work. For techs, finishers, and detail-focused users, that can mean less wasted abrasive and less chance of over-sanding around edges or tight spots.

This Mirka disc uses a grip backing for quick attachment and removal on compatible hook and loop sanding pads. That matters on the job because abrasive changes stay fast, especially when you're stepping through grit sequences. The 20-hole pattern is there for matching to the proper pad and supporting dust extraction on compatible setups, which helps keep the abrasive cutting cleaner and the work area from loading up as quickly.

Because this is a consumable, the practical value is in matching it correctly to your sander and your finish process. The right user is someone who already knows they need a 3-inch, 20-hole, grip-style abrasive in 600 grit and wants Mirka Iridium discs in shop quantity. That includes automotive refinishing work, detail sanding, surface prep, composite work, woodworking finish sanding, and general shop use where fine grit sanding discs are part of the regular workflow.

If you're doing heavy stripping, shaping, or rapid stock removal, this is not the disc to reach for. If you're in the later stages of sanding and care more about surface refinement than raw cut speed, the Mirka Iridium 3 Grip 20H 600 sanding disc is much closer to the right fit.

Mirka Iridium 3 Grip 20H 600 Sanding Disc Keeps Fine Work Simple

This is the kind of abrasive you buy when you already know the job is in the finish-prep stage and you do not want to mess around with a mismatched disc.

• Who it's for: Techs, finishers, woodworkers, and detail-focused users running a compatible 3-inch hook and loop sander setup.
• Why it stands out: The combination of 3-inch size, 20-hole pattern, and 600 grit makes it a clean fit for smaller sanding tools and fine surface refinement.
• Worth knowing: This is a consumable pack of discs, not a complete sanding kit, so make sure your pad matches the 3-inch size and 20-hole layout.

• What type of abrasive is this? It is a hook and loop sanding disc with a grip backing.
• What grit is this Mirka disc? This model is 600 grit, which is suited to fine sanding and finish prep work.
• What size sander pad does it fit? It is made for compatible 3-inch backing pads.
• How many discs come in the pack? Package quantity is 50 discs.