Kraft Tool Co.® CF304PF Bronze Big Bit Groover with ProForm® Handle. 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.