This attachment is a great little time saver. It comes with 4 very heavy thick glass jars with lids that you just fill with ingredients, screw onto the unit, and turn the dial to ground. Very useful for storing already prepared ingredients you may need...

Although I have only used the chopper mill once, I am pleased with it, but must always double check the lid is on straight.

Excellent - does just what it says it will do and is very efficient.