Description Warranty Information PIVOT HEAD KNURLING TOOL Self adjusting pivot head. Shiny black finish. Holder size: 4-1/2"x 1/2"x 1/2" Knurl size: 3/4"x 3/8"x 1/4" Includes 1 pair of medium cut H.S.S. Knurls. PIVOT HEAD KNURLING TOOL