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.

Works good great price

These blades are total crap, don't waste your money!! Bought it for a small project, installing Hardie siding on an outdoor kitchen. Only needed to cut 5 pieces of siding (8" x 3/8" thick) and 3 corner trim boards (3.5" x 3/4" thick) down to size. I know it is an inexpensive blade but thought it could last at least the 50-60 cuts I needed to make. It stopped working at about 20 cuts, the tips broke off and it would not cut a straight or clean line at that point. I made just straight cuts to get the material to length, no ripping of boards down. Totally stopped the progress of the project and had to go buy a new blade from Lowes. Bought the new blade from Lowes for $25.34 + tax and I wish I had just done that in the first place as it worked flawlessly for the 40 or so cuts a had left to make and I will use it on my next project as it is still in good condition. Total crap!!

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.

Used with plug in saw to cut cement siding board, about 8' board and stayed cool. No warping. Used a fiber cement cutting lube on the blade to help. Good price for occasional use. The dust was minimal. I allowed the tool to do the work and it didn't take long at all. Standard arbor size for circular saw.

It will cut Fiber Cement but it is thicker, causes more dust and gets dull much quicker than Polycrystalline Diamond Tipped Saw Blade.

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!

Worked great.

Cut about a 2meter length through 16mm boards before carbide pieces fell of leaving the blade useless.

The blade completed my project with ease and at half the cost of a competing brand how can I not be pleased!

I had about 8 lineal metres of 6 mm Hardies Villabord to cut. The saw started well but as the cuts progressed, the increasing sparks showed that the blade was wearing quickly. By completion, the height and width of the teeth were significantly reduced from new..worn out in fact. On the positive, the blade significantly reduced the amount of dust generated compared to the diamond cutting wheel. Beware the 16mm arbor size..was hard for me to adapt to larger saw. Expect very short life only on fibre cement.

I don't recommend this think kerf blade as it wobbles too much causing messy cuts.