Irwin Tools 15702ZR 7-1/4" 6T Fiber Cement Irwin Classic

January 8, 2024 update.Well, dang. As you can read in my original post, I was pleased. BUT, now not as much. As I continued to-use the first blade it started to wander. I began began using a 6foot level as a guide instead of freestyle and found the blade has now lost 4 of six tips. This after maybe 100 linear feet of cuts. So I swapped out to the second blade and wow, back to speedy straight cuts.TAKEAWAY? consider it a disposable for little jobs. I will buy an expensive version next and report back!Original review:I've been using a masonry blade on my skilsaw to cut 5/16" Hardie 4x8 sheet siding panels. That's because I already had one and all the cement board blades seemed too pricey. I saw the price drop on these, but boy! So many bad reviews. So I bought two figuring I could always send them back. Plus I could compare the wear on the first one to see how it is holding up.The verdict after 24 linear feet of cuts?THEY ARE GREAT!They produce much less dust (you still need a good n95 mask and good ventilation) and cut clean, straight and fast. I'm really happy to be relieved of what was a nasty chore. There is NO visible wear so far on the tips. Highly recommend. Wish I had not been such a cheapskate before. Can't expect them to last forever, so I will return for more. And maybe get a 10" for the radial arm cutting smaller pieces. I expect I will be just as happy cutting Hardie tile backer.For what it's worth: I'm not an AI robot posting fake reviews. Nor was I asked specifically, nor incentivized in any manner, to post a review. I do not expect anything but to get what I paid for. I think this time, I did even better.

I was surprised, I only needed to make a couple of cuts in a cement board sheet however this blade performed very well. I was thinking it would be toast after a couple of cuts but held up well. I would purchase this item again.

This cut through 80x 8in boards and ripped 40ft to cover 560sq ft without a problem. I don’t doubt the issues mentioned in other reviews. I’m just betting on bad quality control. Buy 2 of these Irwin blades, and you’ll still spend half what you would at the big box store.

Sucks. Awful from the very first cut. I cut cement board regularly. This blade made a rough cut like a used crappy one does right out the gate. There are other same price options that are hands down a better option. Save your money! Opt for wen or janchi brands.

Used to cut Hardie Plank. For a cheap blade it held up well. Bought it for a small project expecting it to be worn out by the time I finished. I used it on another job, it had one tooth missing but still cut okay. I was able to finish project. This blade is much better than some other cheap blades out there. Good blade for small siding jobs.

Worked well for precise clean cuts to hardie board. Much better than score and snap.

Home project guy here. I used this blade for 20-30 cuts of Hardie plank siding and trim, then 2 years later, I used the same blade to for another 20-30 cuts on Hardie siding for another project. By the end of that project, the blade was smoking and sparking, but it still cut, so if I need to cut any more Hardie, I'll buy another blade! None of the blade tips ever separated during my use. I suppose that a professional user would want to spend more on a blade, but for me, this one was perfect!

This Irwin Tools Fiber Cement circular saw blade made a tough and messy job much easier and cleaner. No jagged edges to try to clean up. No wrestling the saw to stay on the mark. Better fitting, easier to seal joints. You'll be glad you got it! It fits my DeWalt 7 1/4" circular saw just fine. Cuts smoothly and guides without strain.But definitely wear your safety goggles and a decent mask. It's a cleaner cut, but there will still be flying bits and some dust you do not want to be wearing, breathing, tasting, or getting it in your eyes!