AccusizeTools - 1"x12" RH SCLCR Indexable Boring Bar Holder with CCMT31.51/32.52 Inserts, P252-S408 Shank Diameter: 1'', Overall Length: 12'', Using 80 degree carbide CCMT inserts negative 5 degree end and side cutting angle Insert CCMT 32.51 or CCMT32.52 Included & Key Included. Accepts Inserts CCMT 32.51 or CCMT32.52 S16T-SCLCR4. Extreme fine gloss finish Profiling bar for semi-finishing and finishing operations. Bar hardness approximately 45HRC Negative 5 degree end & side cutting angle. Positive 80 degree diamond CCMT inserts