HHIP 1009-0500 SCLPR 08R/R2 Indexable Boring Bar Boring Bar Style8R-2; Shank 0.500; Minimum Bore (Inch) 0.625; Length 8 Insert Style CPMT-21.51, INSERT not INCLUDED; Screw M2.5x8 Use for boring & facing; Torx Wrench T-8 11 degrees Relief; Negative 5-Degree Lead Angle for Boring and Profiling Torx Wrench T-8