Features: Make- contact with insulated wires without cutting or stripping insulation. Spring loaded double "v" clamp holds wire centered- for piercing needle. Made of quality plastic, nice texture, strong and wear resistant, for long term use. The piercing clip set can release from insulated wires without piercing the insulation. Simple use. Just- link it to the banana plug, and the other end can be connected to the insulating wire. Specifications: Material: plastic Length: apporx 9.6cm/3.8in Pin: 2mm Color: yellow/red/black Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2x Wire Piercing Probe