Blocks

Ronstan Series 55 Ratchet Orbit, suitable for all racing dinghies. 

FEATURES

• Ultra Lightweight
• Low friction 2-stage Orbital ball bearing system
• Highest working load in its class
• Low profile and compact
• High performance cleating
• Easily fitted and securely retained Dyneema® Link head

Ronstan Orbit 55 ratchet block, ideal for multiple applications, including dinghy mainsheet systems. 

Compact, ultra lightweight and extremely strong. For dinghy mainsheets and control lines.

Compact and extremely strong blocks. Ultra lightweight for mainsheets and control lines.

Compact and extremely strong blocks. Ultra lightweight for mainsheets and control lines. These blocks can be used as becket blocks too.

Harken model 2135 57mm ratchet block, used as Optimist mainsheet block with 2-way link.

Harken 40mm block on Dyneema with shackle, for the Optimist mainsheet.

Harken 40mm carbo ratchet block, used as Optimist mainsheet block and Laser mainsheet block.

Harken 4029 mm link block on Dyneema with shackle, for the Optimist mainsheet.

Stand-up kits feature a clatter-free rubber boot. You can attach the Dyneema link so that the block is aligned with the stand-up base or across it. It's a neat, low-profile solution which allows full articulation.

Harken hook-in block for the Optimist halyard system.

The RF2455 stand-up kit features a clatter-free rubber boot. You can attach the Dyneema link so that the block is aligned with the stand-up base or across it. It’s a neat, low-profile solution which allows full articulation.

Harken 57mm carbo ratchet block with 1.5X grip, model 2166, used as Optimist mainsheet block and Laser mainsheet block.

Optiparts hook-in block for the Optimist sprit halyard system

Harken 40mm carbo block with swivel.

The 16 mm is Harken’s smallest block. It is perfect for small synthetic control lines found on high-tech dinghies.

The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load.

The 404 uses an O-ring to keep the line in the sheave during intermittent loading.

Flexible 40mm PVC boot to mount under ratchet blocks. 

38 mm Windesign low friction ring spliced with Dyneema to a safety snap shackle. An extra loop is added below the ring for an easy switch between 1:2 and 1:3 mainsheet.