100% Bronze Groover. A unique longest wearing one-piece casting won’t wear out with extended use in concrete like steel groovers. Each blade is hand polished for a smooth professional finish every time. This 6″ x 4-1/2″ groover features a deep bit that has a 3/8″ radius and is 3/4″ Deep, 7/8″ Wide. The comfortable ProForm? soft grip handle is secured to the casting. The signature orange and black handle is easy to find on a jobsite.