13-1/2" x 6" Safety Ramp Walking Straight Groover 1" Spacing13 1 2" x 6" Safety Ramp Walking Straight Groover 1" Spacing ideal for cutting grooves in sidewalk safety ramps where water drainage and traction are critical. The strong stainless steel blade creates a clean smooth cut with easy clean up. The straight ramp groover features a 1 4" x 1 4" groover bit is formed by a single piece of stainless steel for a completely smooth groover. The grooves are spaced 1" apart in the center to create traction on the