This Harken Classic 57 mm single block is a smooth-running and reliable block for efficient sail trimming on board.
The block is designed for low friction and quick release, ensuring that trimming can be performed precisely under various loads.
With free-running Delrin ball bearings, UV-protected components, and stainless steel reinforcements, it is well-suited for demanding use on sailboats.
Key features
57 mm sheave for lines up to 12 mm
Maximum working load of 227 kg and breaking strength of 1134 kg
Free-running Delrin ball bearings for low friction
UV-protected sheave and carbon-infused sideplates
Stainless steel reinforcements with rounded edges
