Speedmaster pushrod length checking tools are precision crafted from steel alloy for years of accurate measurements. Speedmaster offers these pushrod length checkers as easy and economical tools to lay out and determine proper pushrod length for proper valvetrain geometry. This is necessary to obtain the desired results from the cam and ensure that damage is not done to the rest of the valvetrain. Made from a 3/8 in. pushrod that is cut and threaded with around 1 in. of travel, they have a 3/8 in. ball tip on both ends.