Material : Carbon steelRust proofAnti-slip handleMax. Cutting Capacity Copper 3.0 MMMax. Cutting Capacity Iron 2.8 Steel 1.6 MMMax. Cutting Capacity Steel 1.8 MMKnife edge quenching treatment, hardness reaches 54~62 HRC,strong shearing force can cut steel wire, copper wire, ironwire.The pliers are black-treated and finely polished on both sidesfor anti-rust.