The Swiss bobbins with the angular handle have been very popular for several years. Your advantage: they do not roll on the pillow and thus reduce the risk of the thread being twisted. The so-called "double groove", more precisely: the depression in the head of the bobbin takes up the loop, which is looped around the head twice as with the German bobbin. This prevents the loop from pulling into the thread. Polished and protected with fragrant Danish Oil.