The Lisle Wire Insertion Tool Set, No. 61030, includes the 1/4" O.D. and 3/8" O.D. wire insertion tools for installing or repairing audio equipment, aftermarket lighting, alarm systems and much more. With a sharp point on the end and palm-size handle, these tools provide extra leverage to pierce through firewalls, rubber grommets and panels. The 10-1/2" steel tube provides easy access to feed wires through the firewall. These tools are also available individually.