Whether you are in need of a relay bypass switch, master relay test, or test jumper kit, our fuse and relay testing tools collection delivers the durability and precision you need for demanding tasks. Explore our comprehensive line-up, featuring a wide range of specialized tools engineered for both professional mechanics and DIY enthusiasts.

Free shipping for any order above $150, and we offer a free tool for purchases over $400. Plus, if you find any of our tools at a lower price somewhere else within 365 days of purchasing, message us and we'll credit you back the difference right away. Shop from our collection today and elevate your toolbox to the next level!