Expert Quality, carbon steel with hardened and tempered jaws. Continuous crimping at preset tension ensures accurate crimp. Chemically blacked finish with PVC grips. Suitable for crimping insulated terminals as follows: - red channel: 0.5 - 1.00mm, blue channel: 1.5 - 2.5mm and yellow channel: 4.0 - 6.0mm. Supplied with 590 (approx.) mixed pre - insulated terminals in a steel storage case with insert.