The Testclip features an Inline-Retention function: once clips are attached to conductors, the test leads can be detached from the clips so testing can be performed at a different point without re-clipping. Piercing clamps provide precise pressure to pierce insulation on cables of various types and sizes, enabling reliable access to the conductor for measurements. The design is economical and practical: it can be quickly removed to expose the piercing tip for sharpening, extending the product life. The red and black color-coded cylinders allow fast circuit identification and correct polarity during testing. Typical applications - Automotive wiring diagnostics: clamp onto battery cables or harness leads to access conductors for measurements at convenient points without stripping insulation. - Electrical panel servicing or field testing: attach to wires in equipment housings; use inline retention to move test leads between test points while keeping the clips in place. - Laboratory or on-site testing: keep clips attached to primary conductors and connect test leads to different points for multiple measurements without repeated clipping.