Listed is a Ryobi AP-10 Planer blade adjustment and alignment gauge. This is an aftermarket product in NEW condition. If you're like me, you have looked all over the internet and found that the original gauge has been discontinued and impossible to find. This NEW gauge works just like the original, consistently makes aligning a brand new 10" blade, or a sharpened 10-inch blade to the proper depth much easier and quicker. Ryobi AP-10 Planer Blade Gauge 6072883. For use with brand new 10-inch planer knives or newly sharpened 10" knives.