Dillon 550 Quick Change Kit RL 550 Series Deluxe Quick Change Assembly Kit With a quick change assembly kit and a caliber conversion kit (sold separately), you can convert your RL 550 Series press form one caliber to another in less than a minute. Includes: Powder measure Powder die Toolhead Toolhead stand The products offered for sale on this page can expose you to chemicals, including Lead, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.