Our 16-piece tool set for removing glow plugs in carbon steel construction is made from high-quality alloy materials to ensure long-lasting durability and stability in automotive repairs, making it your ideal auto repair tool. This kit includes 12 mm and 30 mm hex screws, cone tools, and drill installation tools, suitable for a range of engine repair requirements and providing comprehensive support for your auto repair work. Equipped with an E10 socket plug and a T-handle, it enables easier execution of complex automotive repairs, improves work efficiency, and meets the standards of professional auto repair tools. The tool set contains a 7 x 5.5 mm drill bit and a 9 x 5.5 mm drill bit, as well as two 2 x 3.5 mm thread-cutting tools to ensure accuracy and help you complete various engine repair tasks with ease. Use scenarios - Replacing glow plugs in engines that require 12 mm or 30 mm hex screws, using the E10 socket and T-handle for leverage and precision. - Drilling and threading tasks during glow plug service or related engine repairs with the included drill bits and thread-cutting tools. - Using the cone tools to align and access components around glow plugs for easier removal and installation during engine repair work.