8" x 8" square end, 3/4" bit depth, 7/8" bit width, and 3/8" radius double bit airplane groover made of high-quality cast aluminum includes EZY-tilt Bracket. By jointing concrete with the airplane groover, you are giving the concrete a place to settle without leaving cracks through your concrete slab. Unless you will be cutting your joints later with a walk behind saw it can be finished with this groover when you are finishing the fresh slab. Handle Not Included. See our extension handles, and handle adapters.