Innovative wedge shaped insulated tip threads through wire bundles to extract the wire to be tested, Tip is insulated to avoid shorts, Spring loaded XEL EZ-Hook centers wire and pierces insulation in one easy motion " Accepts wire up to, 125"" in diameter Shrouded banana plug ends connect easily to your diagnostic meter, Sold as pair (1 Black 1 Red), 90° banana jack, Screwdriver style tip, V-groove, Insulated tip, Compatible with most multimeters, SKU: ISN4493