Helps Remove Bosch And Lucas Diesel Injectors Which May Be Difficult To Move EASY TO USE: To use, first attach the tool to the injector you wish to remove, then yank the weight towards the handle to give an extra snap of weight to the stuck part; The force transfers to the shaft, pulling the attached end and injector in the desired direction; Repeat action until the part is removed; Always work with a cold engine to avoid damage and remember to replace all injectors as a set to keep engine balanced.