Now changing powder meters is as easy as pushing a button with Hornady lock-n-load powder measure. To switch calibers, push the lock-n-load insert release button, remove the metering insert and put in another. Comes complete with mounting plate and standard lock-n-load metering insert. The plate mounts easily on your bench and features two openings to mount your lock-n-load powder measure. The standard metering insert features tension adjustment for easy setting and a .5 grain to 100 grain capacity, depending on your powder.