AjustLock Mixed Sizes Mixed Finishes Barrel Bolt Catches are compatible with 2 inch light duty barrel bolt locks to 8 inch extra heavy duty barrel bolt locks. Per Jar contains 30 unit mixed sizes mixed finishes (zinc, brass tone and black) barrel bolt catches. These adjustable catches work with any misaligned barrel bolt and solve the common barrel bolt door shift issue. With AjustLock catch, you install it once and it adjusts on its own.