This is a new genius little tool that will hammer in a new dipstick tube into the engine block by pushing on the actual lower flange of the tube. It will work on any small block or big block curved dipstick tube from 1956 on up. Using this tool will allow you to hammer the tube in tight and create less leaks. Dipstick tube shown in photo is NOT included. It is only shown for reference. Sku # 3686