Puncture clips allow the user to apply the precise pressure needed to penetrate 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, which extends the product's life and eliminates the need for full clip replacement. Red and black color-coded barrels enable quick circuit identification, while the bright yellow body ensures visibility in low-light conditions. The test clip features an in-line retention design; 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 is +/- 1-3 cm.