This hand groover is for grooving coved seam and short detail seam areas. Includes top and bottom guide fins that insert in the seam for guidance when grooving coves or grooving flat on the floor. The guide fins pivot out of the way for cleaning out cuttings from the blade. The sharp double-edged 3.5mm U-Blade is made from hardened and ground high-carbon steel. Takes standard profile U-Blades (Crain No. 958).