Schacht manual bobbin winders are belt driven, have self-lubricating bronze bearings, and are available in single-ended and double-ended models. The single-ended winder has a tapered shaft that will accommodate a variety of bobbins up to 6" long. The doudle-ended winders can be used for bobbins, pirns, and a variety of flanged spools up to 9" long. A clamp incorporated into the design means you'll never have to hunt around for a "C" clamp again.