Complete key chain sets for the m150 ProMaker button making machine. This set includes everything you need to get started making your own customized professional promotional key chains in your button maker! It includes shells, slotted flatbacks, chain style key chains with a split ring on one end and connection tab on the other. Just press a button like normal using the slotted back instead of a pin, and then insert the tab into the top when done! Now your keys can represent you!