The high-tech side of General Tools features more than 500 electronic test instruments, made with industrial-grade components for accuracy both in the field and around the home. We offer state-of-the-art solutions for HVAC, sports medicine, agriculture, weather analysis, building maintenance and much more. For nearly a century, General Tools & Instruments has produced some of the most inventive and well-received hand tool designs in the world. Along with our Test Instruments, we also offer a wide variety of& HVAC Tools and Measuring Tools.