Harken Swivel Base Jammer with 150 Cam Matic

Ball bearing swivel base featuring dual rows of Delrin ball bearings that swivel freely even under high loads. Includes a stand up spring and a U adaptor to accept a variety of blocks.
Ideal for mounting in the cockpit of larger dinghies and keelboats which use up to 76mm (3 inch) plastic blocks.
The 150 Cleat will accept a line size of 3-12mm (1/8 - 1/2 inch)