HARKEN Swivel Base with 150 Cam-Matic Cleat, 144 Shackle Depth_Less than 1/2" Depth Harken 51mm Single High-Strength Block

Harken 51mm Single High-Strength Block to carry wire halyards and high-strength control lines

Good for jib and mainsheet systems on dinghies and sportboats

Designed for any number of uses on dinghies and for lightly loaded control lines on boats of all sizes

SpeedGrip handles use a molded urethane knob with an independent ball bearing swivel on the top of the grip to allow much faster grinding under low loads and more powerful two-handed grinding under high loads

The stainless steel shackles we use on Harken blocks are available separately

HARKEN Swivel Base with 150 Cam-Matic Cleat, 144 Shackle Depth_Less than 1/2" Depth Harken 51mm Single High-Strength BlockUse cam swivel bases when leads must rotate to face the trimmer; good mainsheet pedestal for dinghies. Ball bearing swivel bases feature dual rows of Delrin ball bearings that swivel freely even under high loads. Bases include stand up springs and a U Adaptor to accept a variety of appropriate blocks.