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Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
STA-LOK is a registered trademark of STA-LOK Terminals.
MKIV
MKIV Ocean
Typical boat size
6.5 - 24.4 m (22' - 80')
6.5 - 18.3 m (22' - 60') 
Wire headstay diameter range
4 -16 mm (5/32" - 5/8")
4 - 12 mm (5/32" - ½")
Rod headstay diameter range
-4 to -48 (4.37 - 14.3 mm)
-4 to -30 (4.37 - 14.3 mm)
Sailor
Racer (split drum can be removed)
Non-Racer/Cruising
Shape
Aerodynamic Foil
Round Foil
Swivel
Double at head and tack
Single at head and tack
Sizes
Five models (0 - 4)
Four models (0 - 3)
Improved sail shape and boat control
•  Independent halyard and tack swivels furl 
sail center before head and tack for 
improved sail shape when reefed (MKIV). 
•  Both MKIV and MKIV Ocean have a light-
weight aluminum halyard swivel saving 
weight aloft to reduce pitching and heeling.
Split drum removes 
easily for racing (MKIV)
• Line guard and spool remove easily 
 for use with full-hoist sails.
Double and single-groove foils 
offer smooth sail handling
•  Precision-extruded, double-groove (MKIV) 
and single-groove (MKIV Ocean) foils for 
smooth sail handling.
•  Stainless steel feeder allows fast single-
handed hoist and sail changes (MKIV).
•  Black-anodized foils (MKIV) and 
clear-anodized foils (MKIV Ocean).
Designed for easy installation
• Small outside drum dimension fits 
 narrow bows or belowdeck.
• C-shaped open connectors with 
 low-friction plastic isolators easily 
 slip onto headstay wire and into foil.
• Drum assembly fits over existing 
 turnbuckle allowing easy length 
 adjustment. Harken toggle assembly 
 accepts standard turnbuckle using 
 swage, rod, Norseman, or STA-LOK® 
 terminals.
• Eye-jaw toggle flips for fork or tang 
 chainplate installation.
Accessories
• Lead block kit: Easy-to-mount ball 
 bearing blocks lead line aft; fit 25 mm 
 (1") stanchions.
• Halyard deflector: Install above the foil 
 to prevent halyards from wrapping 
 around the foil when furling.
Easy to maintain
• Bearings require no lubrication or 
 isolating seals.
Toggle assembly
Foil 
connectors
Lead 
block kit
Halyard 
deflector
• Stainless steel link plates raise 
 the drum and fit over existing 
 turnbuckle, resist scratches, 
 and can be easily repolished.
MKIV 
Ocean
MKIV
MKIV 
Ocean
MKIV
MKIV 
Ocean
MKIV

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