A loop holds the yarn in place to form a tuft as the needle is removed. The yarn is caught in the backing fabric and held in place for loop-pile carpet or cut by blades for cut-pile rugs.
The rugs are tufted directly into shape, so that no residual material is created. The pile height is adjusted by cutting the yarn earlier or later when pushing it through the grid.
This technique is suitable for any designer, artist or hobbyist who wants to create unique objects such as wall hangings, rugs, or even fashion.
There is a great deal of information and inspirational artists available online.