This simple set of plugs tied together with a black cord and the 12″ pair of stainless steel tweezers are used for changing down nozzle jets on a Chrysler hemi engine. Using the 12″ long tweezers to place the plugs into the open spark plug hole pockets to prevent a brass nozzle jet from accidently entering the cylinder through the open spark plug hole. The tweezers are machined with a “jet slot” on the tips to facilitate changing the nozzle jet on a hot motor. When finished just pull on the cord to remove the plugs, and move on the next cylinder as needed.