I built a Drum Thats got the Silk Screen around the outside. It runs off a roticery motor. Put Clippings inside and turn on it tumbles it like a rock tumbler and way less plant mertiral gets into it you get a lot Tanner of Keef.Also i have 4 ping pong balls inside to help roll around and break shit up. You can press Keef for Hash blocks. Reason there dark is 1 plant mertiral and 2 most who are makeing hash Blocks use a Cold Water Extraction and press the wet THC cry's into block form to dry.