The Butterfly Cylinder Embroidery Attachment will allow you to embroidery on pants, sleeves, socks, etc.
The cylinder device is sold separately and works with the Butterfly Single Head Commercial Embroidery Machine
It easily attaches to the embroidery machine, very similar to how the cap driver attaches.
It comes with the cylinder hoops and hooping device.
As seen in the pictures, the cylinder needle plate, also included.