Hook Block-Nub® opening pulley: The ultimate performance for your listening control Unrivalled lightness, strength and control Discover the Hook Block-Nub ® opening pulley, the most advanced listening control solution on the market. Its innovative design combines exceptional strength with minimal weight, for unrivalled performance and reliability. Versatility and efficiency Hook opening pulley (open ring): Quick and easy installation on the rope. Block-Nub 30 / 40 in Pa11 carbon Block ring locking system: Locks the hook and prevents accidental opening.
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