SAWSET PRO Angle Meter. It has patented scales that allow you to find the right angle without any math. Simple, fast and accurate. Now for the best part - this angle gauge is universal. With it, you can make the perfect angle for ceiling baseboards, cut a floorboard. It works with any angle - single, double, inside and outside. The large scales are the key to accuracy. You'll easily see the right marks even if the lighting isn't perfect. It's made of durable ABS plastic. This means it's lightweight, yet strong enough.