This winder stays with our design philosophy: make simple products that work exceptionally well. Six sealed ball bearings allow the winder to spin almost effortlessly while a well-balanced main winding assembly allow users to to opt to wind with or without a table clamp. Hard maple and premium maple veneered plywood are finished with Danish oil. A modular unit: An important design element that demonstrates quality to me is the ability to disassemble & service tools with little effort. Every tool that receives regular use will need to be cleaned at some point. The ability to quickly disassemble this winder sets it apart from any winder on the market at this price point. You can take the entire unit apart in less than a minute. Suppose you drop the winder and break just one part. Rather than throwing the entire unit away, you can easily purchase just the part you need from this website. Try that with an imported winder. Want to add an "art yarn" guide? Simply loosen the yarn guide set screw and replace the standard yarn guide. It's that easy. Yarn Capacity: The amount of yarn that this winder (or any winder) can hold depends on the tension placed on the yarn as it is fed into the unit and the thickness of the yarn. You should be able to get around 1 pound of fingering weight yarn on this winder. Ten ounces is about the maximum capacity of worsted weight yarn. Thicker yarns will be less. We have found that the capacity is about twice that of our little blue plastic winder. About the belts: Urethane belting is a commonly used cheap power transmission method for this industry. These belts are designed to last about 10 years. If they stretch you can cut, heat the ends, and weld them back together. There is be a little "flashing" that will need to be cut. We also sell replacement belts. Our warranty: Each jumbo ball winder we sell has a one year warranty from date of purchase against manufacturer's defects. You can tell when your item was produced by referencing the serial number on the bottom. We warrant each unit for the year on the bottom plus one year. JUMBO YARN WINDER VIDEOS: Overview, set-up & use: https://youtu.be/bl9D_b3fcfc Proper yarn guide placement supplemental: https://youtu.be/jUfvgn3yfqA Items ship mostly assembled. Yarn not included. Made in our Cincinnati, OH workshop.