Review on Aluminum Sloping Tearing Ruler by Westcott by Jeff Sorensen

I really like this. I found some videos on YouTube where "rulers break how to use them". I also specifically looked for rulers with watercolor paper and that helped a lot. I use cardstock and 240lb watercolor paper. First I wet the paper with a water brush where I want to tear and I have great luck. I make Christmas cards, and the cards with the torn paper edges got the best response from friends who critiqued my work.