The Electronic Specialties Wire Piercing Test Clips, No. 619, are designed to save time when the testing application requires tapping of live electrical readings. They are designed to pierce wire insulation and tap readings in wires where a direct connection is not possible. The clip pierces wire sizes from 14 awg to 22 awg. These test clips are designed to work with most DMM/Scope test lead kits. They connect using a standard size 4mm banana jacks. 619 is sold as a set of two clips.