1.Test probe: The white "cap" Please note the white part is not a cap for the needle. Actually it used for testing easily and protecting you, it has a V-shaped groove, which can also help you fix and aim the wire when you are testing the wire, so it should be flexible. 4.This kit includes high-quality digital electrical test probes, alligator clips, and a puncture wire-piercing test clip, designed for enhanced accuracy and reliable performance in electrical testing. 3.Alligator clip can grip the accessory firmly, clamp strong and has a very bull spring. the open maximum is 23mm. 2.Puncture Wire-Piercing Test Clip: The wire piercing test clip replacement is designed to test circuits, perfect for troubleshooting car's electrical system. 5.Apply to: Excellent back probe kit can not only be used for car, automotive, vehicle electrical testing, diagnostics, irreplaceable troubleshooting, but also can be used in physics laboratories, schools, homes and industries. Can be Used with your multimeter to back probe harness connectors, and not damage connectors or wires when used correctly., Weight: 0.47289155199 pounds, Manufacturer: Aisuoka