Function Great for checking terminal tension. The J-35616 Terminal Probes are the tools of choice for wiring and electronic component diagnosis. Advantages Including a sturdy plastic box. Carefully designed to support correct diagnosis without damaging the terminals or wiring harness. Application The J-35616 Probe Kit includes the most popular probes and components that are required to service majority of current GM vehicles globally. Features Two (2) of each size terminal Six inch (6") probes for easier handling No Banana Plugs required Sizes clearly marked Test Leads plug directly into socket Great for checking terminal tension .