Oldaker 623 This 5 extended tip threads onto any standard probe tip with 8-32 threads. And allows the user to reach difficult areas. It also has a stainless steel tip with a polished point for insulation piercing or penetrating coated connections. The tip is fully insulated to the point to prevent shorting. MATERIAL = .045 Dia stainless steel needle 3.625 long with cut resistant clear shrink tubing. The base is nickel plated brass with 8-32 threads and is molded in polyethelene. SOLD as sets 1 red. 1 black.