Schaefer 3100 Furling System from Sailing ServicesFor Boats 41' to 55' (12. 5 16. 8m) Large diameter drum in System 3100 increases the power to reef large headsails in heavy winds. Low friction bearing inserts eliminate metal to metal headstay contact for less noise and easier turning. Stainless heli coil inserts The System is designed for rod or pre swaged wire headstays that are typically assembled by a professional rigger. Kit includes extrusions, drum, halyard restrainer and wire bearing liners.