Negative 3° End Cutting Edge Angle for 7° Positive 60° Triangle Inserts. Small hole boring without the use of reamers. Greater productivity through better tool utilization. Close tolerances. Eliminates reamers. Better surface finish. Alloy steel boring bar. Set includes: 3 Boring Bars (S08H-STUCR-1.2-2, S08H-STUCR-1.2-3, S08H-STUCR-1.2-4), 10 Inserts (TCMT-520-UF-DHCP25), 1 Torx Key (T-6), Storage Box.