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The timeless styling of our Classic block line 
enhances your boat’s traditional look. Strong, 
dependable and exceptionally free-running, these 
compact blocks are the foundation of the Harken 
block line. We offer them in multiple configurations 
for dinghies, scows, beachcats, iceboats, and small 
offshore racers and cruisers. 
Fast trim and release under load
•  Free-running ball bearings roll on flat 
races with minimal friction.
Corrosion-resistant, maintain beauty 
and strength over time
• Ball bearings, sheave, and sideplates are UV-stabilized.
• Corrosion-resistant stainless steel straps reinforce blocks.
Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.     
DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.
316 Stainless 
steel:
Sideplate straps
Delrin® 
UV-stabilized:
Ball bearings
Materials
For properties 
see pages 
253-254.
CLASSIC BLOCKS
Shackle blocks lock in two directions or swivel to 
keep line from twisting
• Set screw allows shackle to be fixed or to swivel.
Which Block 
Do I Need?

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