OLFA 45mm Rotary Cutter Replacement Blades, 5 Blades (RB45-5) - Tungsten Steel Circular Rotary Fabric Cutter Blade for Quilting, Sewing, Crafts, and Scrapbooking Fits Most 45mm Rotary Cutters

So sharp! Easy to change out and replace in my 45mm rotary cutter.The case is nice to have to store and dispose of the used blades. Cuts through several layers of fabric like a dream!

They have the OLFA name, are sharp and are brand new. Before ordering I had read reviews that commented on the blades being used, and not reflecting the OLFA name. I did not have any of those issues. The only issue I had was that Amazon didnt pack them well so they fell out of their container .

be very careful with these, super sharp

Olfa blades are the best on the market. They are made of high quality steel, hold an edge very well, and cut sublimely. I have used off-brands thinking to get a bargain, but theyre not a bargain. These blades, while they are made for Olfa cutters (also the best on the market) will also fit on other brands of cutters (except for Martelli rotary cutters, which take Martelli blades only). They last a long time when used on a good quality cutting mat and when you dont hit things like pins when youre cutting. They can also be sharpened successfully a few times, which helps make them even more economical. I highly recommend these blades

Olfa products are always a safe buy.

I always buy Olfa blades from my local fabric store. Because of the coronavirus, I decided to buy these online. They are awful! I’ve tried four out of the pack, and they were worse than my used blades. I just tried the second pack that I bought. The blade from that pack that I used is fine. So I don’t know what was wrong with the first pack. I think they need better quality control.

Same price as store but they’ve been out for weeks.

EDIT 2/5/17: With 3 of the 5 blades in the pack unused, I finally gave up. During a recent visit to my local quilt shop, I purchased a pack of ten Olfa blades (not cheap at $59.95, but much better than throwing my money away on these worthless blades). As soon as I put one of the NEW blades on and cut some pinwheel squares I was trimming, I could tell the difference. The blades I purchased locally cut like a hot knife through butter. With these blades that I had purchased here on Amazon, I would have had to SAW through the seamed sections to get them trimmed. There is NO comparison. These are NOT Olfa blades. Or, at least, they are not the same Olfa blades that I get locally. There is something wrong with them - either they are use and re-sharpened (as others have implied) or they are a knock off of the real deal. Save yourself the money and the headache. I learned the hard way. Never again!! ----- ORIGINAL REVIEW: These may look just like Olfa blades (even though the entire package is printed in Japanese), and for the first few days that you use them they perform like Olfa blades, but thats where the similarity ends. Olfa blades that I purchase locally will last me a LONG time. They cut through multiple layers of fabric - often heavy fabric, too. Im on my second blade of this pack, and both of them are the same: they work for about a week, but then theyre dull, even having difficulty cutting through a single layer of Kona Cotton fabric. Annoying! Ive replaced a blade every 4 or 5 weeks. Unacceptable! Blades should last a whole lot longer than that. My locally purchased Olfa blade lasted nearly a year! I would not purchase these again, because clearly I was penny-wise and pound-foolish when purchasing these blades. Theyre not worth it. Pay the money and buy the real ones, unless you like re-cutting your fabric over and over and over . . .

Ive purchased cheaper blades from Amazon-- blades that bent or dulled after the first few minutes of cutting. Lets be honest, people buy a rotary cutter when theyre serious about cutting fabric. OLFA blades can go the distance. They dont bend or dull after the first pass. Ive had success using the same blade on multiple projects. Worth it.

from semi transparent packaging - the hole looks just to be round but when you open you see it is the right shape as shown think I could have used round hole ones - but this shape was on my board from someone using on an old dark gray Fiskar board with an orange guard and orange grid - seems to work fine