The Super Agata Bench Capper features a self-adjusting spring-mounted capping mechanism. This makes it easier to adjust for different sized bottles. Simply raise the arm all the way up and you will be able to adjust the height of the capper to fit different size bottles. Works on standard American 26/27mm crown caps, features a magnetic capper head and self-stopping crimping bell. Can be upgraded to a 29/31mm crimping bell for champagne bottles or other European type bottles.