The Lace Kit includes TWO lace bobbins, a lace flyer with low friction ceramic inserts, and a fast pulley (whorl).
The lace bobbins have a “fat” core that reduces the tension on the yarn as you spin. The ceramic inserts in the flyer have a very low friction coefficient so the spun yarn glides effortlessly through the guides. The fast pulley will help you spin finer yarns with ease. The ratios possible with your fast pulley can be found on the individual wheel pages under the "specifications" tab.