AIR, POWER & HAND TOOLS. Thank you for shopping with us! 5 Piece SCLCR Indexable Boring Bar Set Includes 5/16, 3/8, 1/2, 5/8, & 3/4 Style A, B. C, E, & F Utilizes CCMT 80° diamond inserts.Negative 5° lead angle for boring. 3° side & end cutting edge angle. For profiling bars for semi-finishing and finishing operations. Some browsers do not allow this option.