Customer Reviews
It's a bargain, considering how long it lasts 
2003-11-27
When I first bought my Bosch 3727DVS, I bought a box of the popular grades; 80, 100, 120, 150, 180, 220, and 320. The 100, 120, and 150 are the most frequently used.To tell you the truth, I rarely use the 320. I just went through over 50 boards of 80+ inch cedar, in three grades, and I only used about 10 sheets all combined. That is about 3 for each grade. The advantage to quality paper, is that you can get in a groove with some consistency. Instead of having cheaper paper that gives you the new disc agressiveness, then quickly to the used paper smoothness, which may be a grade finer, and miss the deeper lines from the coarser grade of paper in the previous step. Additionally the backing paper is stiff enough to do the job. That way you don't wind up with a buggered edge on your sander. The 6 or 8 hole paper is nice for the dust free environment. I simply attach a 2 1/2" vac hose to the dust port on my Bosch, which is way smaller than that, so a lot of air escapes. The vacuum draw that leaks around the inlet, sucks up that last 1% of the dust coming off the paper. It is still recommended to wear a mask because the shop vacs only capture to a micron or so. So technically you have a vac system that is actually a mini-part of a micron, invisible dust manufacturing plant. Over time, even that is a consideration. A good respirator, not a paper mask is advisable. A fresh air system is even better.
I had a body shop for 20 years, and after using the cheaper paper on the random orbit sanders, and winding up with a floor full of used paper, I can attest to the savings of using quality, aluminum oxide paper. It is actually cheaper, in addition to doing a better job. Highly recommended.
Great 100 grit paper 2001-08-03
Mirka has an outstanding H&L product. The 100 grit cuts extremely well, has tremendous lasting capability and is easily reusable many, many times.
great buy 2000-07-14
I have been using these discs for years.I really like the diapenser pack box. It keeps them in until you pull one out. The paper cut very well and lasts reasonably long. Better can be had but you'll spend a lot more for them. Use these until they lose their edge and slap a new one on. If your time is worth money you will save by throwing a worn pad away instead of trying to wring the last bit of life out of it. As another reviewer already said, with these you can afford to throw them away. I plan on ordering more pretty soon in several grits.
Don't run out! 2000-06-22
I like to get the boxes of sand paper so I don't run out. These match my Dewalt DW421 just like they are suppose to.
They line up easily and are easy to attach and detach later. But they stay put while in use.
100 grit is about as rough as I like to go with a ROS. And that's usually just for some light rounding.
A Great Value 
2000-06-13
I have been using Mirka hook and loop disks for about 3 years on my Bosch 3725 orbital sander. The disks do a good job on wood and epoxy/fiberglass without clogging. The disks do not last nearly as long as the coated disks, but you can't beat the price. I use the disks in boatbuilding projects. Because of the mostly curved surfaces, the edges wear out long before the abrasive under the pad. If you are sanding mostly flat surfaces, the disks will last much longer. Most sander manufacturers recommend that you change disk often. With the Mirka disks you can afford to do so without taking out a second mortgage.
Good product but nothing special compared to others. 
2007-12-21
I bought the assortment pack as well as 120 and 220 grits in preparation for refinishing my kithen cabinets. I have used the 80 and 100 grit from the assortment pack and find them quite acceptable. However, I don't see much difference between this brand and the Norton abrasives brand I can buy at Home Depot. Packs of 50 are almost $10 in the store, Mirka are around $8 per 50 sold in 100 packs. Once you add shipping, unless you buy a large quantity, you're not saving anything. I disagree with one of the other reviewers that said Norton brand discs are thinner and ware out faster. I couldn't notice any appreciable difference between Nortons and Mirka's disc thickness. The abrasive is aluminum oxide for both.
Good Sandpaper for ROS 2007-10-05
Mirka sandpaper is a good value, with a large pack and quality product. Discs hold to hook and loop sander just fine. Quantity is good size, and price is decent.
These ARE a great value! 2004-08-08
First of all I have to say that the reason why I happen to be writing this review is because I was on Amazon ordering another box of these sanding discs! There is no higher praise in my book than a return customer!
Now for the review: I have to agree with the other positive reviews and say that I have long been a fan of these Mirka sanding disks. I am a home woodworker whose projects range from DIY stuff around the house, to refinishing, to building fine furniture projects. I have been using these discs for years (in every grit from 80 to 220) and could not be more pleased with the smooth surfaces they produce with my rather inexpensive sander.
I completely agree with the assessment that although these are not the absolute best hook and loop discs on the market, they have performed every task I have asked of them. Overall, I would give this product an A- for quality/performance, and an A+ for value.
Good Quality, Great Value 2004-03-31
I have purchased every grit of Mirka sanding disks from Amazon, and I find them to be good quality. The price per disc works out to be a great value if you purchase them in packs of 50.
I used these disks on my Bosch random-orbit sander. The hook-and-loop backing is strong and holds on through rough sanding. The aluminum oxide sanding material lasts for a good amount of time. I've used them on a variety of wood surfaces, and I have used them to remove paint, and they last long enough to take down a lot of material. I have bought other brands of sanding discs that do last longer, but the Mirka discs definitely hold up well.
The discs are packaged in a sturdy box with a cover, which makes it easy to dispense them as needed. Also, having them stored in a box keeps them clean, which helps the hook-and-loop function. This actually helps out a lot in the shop. Other brands come wrapped in plastic, and you have to find a container for them, or let them sit on a shelf and get full of sawdust. I appreciate this extra touch.
The paper stock is somewhat thin, but this does not really affect their use. Since they are stored in a box, they stay flat. Other brands, which are stored in bags, get curled up on the edges.
Bottom line: these are good quality sanding discs that last for a good amount of time, are a good value for the money, and are packaged in a convenient way.
Can't Get Them 
2004-03-16
Amazon website indicates the item usually ships with 24-hours. Ordered enough for free-shipping thresehold, twice. Been trying to order/receive since 6 Feb - still waiting. Ordered again a few weeks later, 3 Mar and was advised the disks would ship in about 10 days. 9 Mar received a delay email, estimated ship date was sometime between 18 & 25 Mar, Probably a good product at a good price - but I think Amazon may have over sold the item, the vendor cannot supply, or the extended handling time associated with Amazon's "free shipping" may be the hold up. Plan to give it a couple more days, then cancel the order, and try to find a vendor who has them in stock and just pay the shipping! This is NOT the first item I've had this experience with at Amazon!!!
