I have the 'Gingher' rotary cutter and blades and love them. Last weekend I took a Buggy Barn class and was able to cut through 9 layers of fabric with the blade with no problem. I was slash cutting 9 layers for about 10 minutes and had no problems at all. You can use the blade on a 45 Olfa cutter, also. I have a Gingher blade on my Olfa cutter. The Gingher rotary cutter is very expensive. I wouldn't have bought it, but I got it on sale. Normally it's $69. I'd never pay that price. But it's so easy to chance the blades. It's a one move punch to change the blades. It's so nice!!!