Kraft Tool 24 Diameter Chamfer Tube Bronze Edger ProForm CF385PF. Long-wearing polished 100% bronze one-piece casting. Belt polished surface for cutting clean smooth edges. 1/2 In. radius with 1 In. lip for even coverage. Turned up edges to move smoothly through concrete without gouging. Creates a smooth chamfered edge on round support piers to prevent chipping. Slope on edge can be varied based on wetness and pressure.