100% Bronze Groover. This 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 clean, smooth professional finish every time. This groover features a deep bit that has a radius and is deep, wide. A durable tool for creating control joints in sidewalks, driveways, and other surfaces. The smooth wood provides a comfortable grip. The handle is secured directly to the casting. Proudly made in the USA.