This bronze groover attachment makes your walking bull float into a long-handled groover by simply turning the two thumbscrews. The groover creates a 1/4 In. radius to prevent the edge of the groove from chipping. This 8 In. long groover features a bit that extends to 1-1/2 In. deep and 1/2 In. wide. The polished bronze groover cuts through concrete with ease. The durable material provides a long life for the tool. Attach multiple groovers to create parallel grooves. Fits on 8 In. wide bull floats.