1. “Klein Tools – For Professionals since 1857.” Klein Tools. Retrieved from https://www.kleintools.com/about-us
2. “Klein Tools Warranty Information.” Home Depot. Retrieved from https://www.homedepot.com/c/klein-tools-warranty-information
3. “How to Sharpen Pliers – The Right Way Every Time.” The Spruce Crafts. Retrieved from https://www.thesprucecrafts.com/how-to-sharpen-pliers-4685040
