Robert Sorby Standard Parting Tool 1/8" (3mm) - 830HRobert Sorby Parting Tool 1 8" Handled 810H 3 4 Used to part the finished project off from the waste material, the parallel sides make for a rigid tool that handles well. The " 3mm tool reduces the amount of waste, vital if using an expensive wood. It also makes for a fine detailing tool, e. g. beads and fillets. GENERAL CARE We recommend applying a light oil to the blades when not in use to keep them in perfect condition.