Ball bearing swivel bases feature dual rows of Delrin® ball bearings that swivel freely even underhigh loads. Bases include stand-up springs and a U-adaptor to accept a variety of appropriate blocks. The 144 is the standard configuration with a tall arm. It is ideal for mounting in the cockpit or for use on larger keelboats and small offshore boats that use 3.00 in (76 mm) plastic blocks.
Minimum line Ø (mm)
Maximum line Ø (mm)
Fastener spacing (mm)
5 FH mm
57 mm / 75 mm / 2.25" / 3.00" / ratchets