HARKEN 57mm Carbo Ratchet Block - Swivel, Becket, 2136

<p>Harken 57mm Carbo Ratchet Block with Becket allows either a 2:1 or 3:1 purchase.</p>
<p>Carbo Ratchet blocks allow sailors to hand-hold loaded lines and offer a balance between holding power and controlled easing. Lightweight Carbo Ratchets are available in 40mm, 57mm, and 75mm sizes. All the Carbo Ratchets feature a recessed On-Off switch that is easily operated from either side. The 40mm cam-arm versions work in ratchet mode only. Commonly 57mm blocks are for jibsheets and spinnakers on medium-sized dinghies.&nbsp;</p>
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<p>The 40mm, 57mm, and 75mm Carbo Ratchamatic&reg; is adjustable for many applications and weather conditions. The load-sensing ratchet block rolls freely in both directions under low loads and then engages the ratchet automatically as loads increase. With a 180-degree wrap, you get a 10:1 holding power.</p>

• Use for spinnaker sheet systems on dinghies, sportsboats, and medium keelboats
• Ratchet blocks are hand and crew savers
• Allows a line to be eased instantly with control
• Hard coat-anodized aluminum sheaves
• Stainless steel swivel shackle