This drum is made from very strong and durable 304 stainless steel. It differs from the drum for fresh trimmer in having different size grooves, which are narrower, thus ensuring that the little leaves are lifted and remain close to the blade.
Swapping a drum for another is very simple and does not require any tools. Simply remove the hopper, opening the cover first and then the trimmer. Then just remove one drum and place the other one. Finally close the cover and the trimmer is ready to operate.