I just used mine yesterday. It does not have measurement markings but it doesn't matter. I used it on top of my ruler. I set up my ruler where I wanted it, then placed it on top of my ruler. I thought it worked really well. I was cutting full length strips and was able to cut the first half, lift the Slidelock, move it to the other end of the ruler, and continue my cut. My husband said if he had known about it earlier, he would have bought it for me!!! That would have saved him HOURS of help holding my ruler over the years.