visibility bright yellow body with red or black colorcoded cap for easy identification. Makes contact with insulated wires without cutting or stripping insulation. Springloaded double V clamp holds the wire centered under the piercing needle for precise, reliable contact. Tiny hole left in insulation can easily be sealed after use. Pierces insulation on wires from 22 to 14 AWG (0.030 inch through 0.180 inch diameter). Suitable for quick, nondestructive wire taps in a range of applications. Use scenarios: Automotive wiring and harness diagnostics: tap into power or signal lines without cutting or stripping wires, enabling sensor or data logger connections. Electronics prototyping and testing: quickly attach test leads to live circuits during development without invasive wiring changes. Field wiring and electrical installations: perform nondestructive taps in installations where preserving insulation is important, with a sealable puncture after use.