This in-line ignition spark checker from Harbor Freight (Item. 04424) is a must-have for any automotive enthusiast. It allows you to quickly and easily diagnose ignition problems without having to remove spark plugs or other components. With its simple design and easy-to-use functionality, this spark checker is perfect for both professionals and DIYers alike. It is manufactured by Harbor Freight and is made in China. This item is categorized under eBay Motors and Automotive Tools & Supplies, specifically for Diagnostic Service Tools and Ignition Testers. Don't miss out on a chance to easily diagnose and fix ignition problems with this in-line ignition spark checker from Harbor Freight.