Heavy-Duty Insulation Piercing Test Clip Safety-designed, clamp-type, piercing clip for use with automotive, marine, aviation or control circuits. Spring loaded stainless steel tip pierces insulated wires otherwise inaccessible test points.. Extremely small piercing point to retain maximum integrity of pierced insulation. High-quality insulation material resists breakage. Chemical and heat . Pierces insulated wires from 30 AWG to 14 AWG. Current rating: 5A. Compatible with all standard 4mm diameter shrouded banana plug test leads. Recommended to use with Fluke TL24 AC89