Designed to ensure damage-free installation. Threads are 3/8-l 6 to fit the threads of the pulley shaft . Internal roller bearing allows for easy turning. Wt., 11 oz. An ideal companion to the 7185, the 7005 is a real time- saver when it comes to installing power steering pump pulleys and GM press-on water pump pulleys. Won't damage internal components by exerting force through the pump shaft.