The Packer Brush improves carding significantly by: Allowing you to card a thicker batt by packing the fibres down into the teeth of the cloth on the large drum. It helps control and reduce flyaway's in fine low crimp and non wool fibres such as mohair, angora, silk, bamboo and alpaca. Improved carding, especially for short fibres, by straightening and transferring more of the fibres to the large drum. With the packer brush you can now successfully card a vast selection of fibres that otherwise seemed impossible. Simple to attach, there are no holes to drill and no other tools needed - everything is included in the kit.