Precision made maple bobbins for Schacht spinning wheels. Made from maple and come with an oil finish. Choose the "Standard" for all spinning with the wheel set up in the "Scotch Tension" mode and for "Double-Drive" with the "Extra Slow Speed", "Slow Speed", "Medium Speed", and "Fast Speed" whorls. Use the "High Speed Bobbins" when in "Double-Drive" mode using the "High Speed" and the "Super High Speed" whorls.