Barton Marine's Furling Drum. Single-line operation for dinghies, dayboats and light cruising yachts. Works with a common top head swivel. Stainless steel ball races for smooth operation. Drum is molded from glass fiber-reinforced nylon with stainless steel swivel and ball bearing assemblies. Accepts line up to 4mm dia. and holds up to 8.5m of line.