The Lace Kit includes two lace bobbins, a lace E-Flyer and a fast whorl. The lace bobbins have a "fat" core that reduces the tension on the yarn as you spin. The lace E-Flyer and E-Hook have hard-wearing ceramic inserts. The ceramic has a very low friction coefficient so the spun yarn glides effortlessly through the guides. The fast whorl will help you spin finer yarns with ease. The ratios possible with your fast whorl can be found on the individual wheel pages.