This knife is used to trim excess welding rod from the seam area after cooling to make the seam area flush with the rest of the floor. It is used in a two-step process in conjunction with the No. 986 Trim Guide. First, insert the trim guide beneath the knife and trim off the bulk of the material on a first pass. Afterwards, remove the trim guide and make a second pass with the knife only. The fine cut of the second pass finishes flush with the surrounding floor. The knife comes with a protective pouch. Trim guide not included.