Puncture clips allow the user to apply precise pressure to puncture the insulation of various wire types and sizes. The design is cost-effective and convenient, allowing quick removal to expose the puncture tip for sharpening, extending product life and eliminating the need to replace the entire test clip. Red and black color-coded barrels enable fast circuit identification, while the bright yellow body ensures visibility in low-light conditions. The test clip features an 'in-line retention' function; once attached to the leads, the test leads can be detached from the clips for use in another location. To use, attach the clip to a banana plug and hook the other end onto an insulated wire. Turning the red or black end drives the sharp needle through the insulation to contact the conductor. The puncture probe allows voltage measurement with a voltmeter without cutting or stripping the insulation. Color: Yellow + Red. Material: Plastic. Package Contents: 4 x Puncture Probe, 2 x Banana Socket (multimeter lead). Note: Light reflection and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.