Genuine OEM replacement part, this item is sold individually.
This is the Vacuum Bag Kit for the Blowers shown below.
When the Blower is changed to vacuum mode it will pick up debris and keep them in the bag.
To empty the bag, unzip the bag and the contents will be able to be dumped or put in the garden for mulch.

This is a standard hardware which has multiple applications based on your tool. It is sourced from original equipment manufacturer for use with a variety of power equipment. Please refer to diagrams for proper application. This screw is made out of metal and it is sold individually. Requires a hex key or an allen wrench to install or remove it.