Ratchet blocks are indespensible for reducing the force required to hold a highly loaded line.
I always use one in my blokart® and DN iceboat mainsheet systems.
I've used all three of the ratchet blocks listed below for a number of years.
Both the Viadana 14.10 and Nautos 92710 57mm ratchets work great on the blokart®.
The difference is the Viadana uses a slotted sheave while the Nautos has a faceted sheave.
Both designs work well on the typical blokart® mainsheet diameters.
The Nautos 92609 75mm ratchet is perfect for the higher sheet loads found on the DN.
I've had one on my boat for the past few years and it hasn't given me any trouble.
57mm Diameter Ball Bearing Ratchet Block With Slotted Aluminum Sheave
57mm Diameter Ball Bearing Ratchet Block With Hexagonal Faceted Aluminum Sheave
75mm Diameter Ball Bearing Ratchet Block With Hexagonal Faceted Aluminum Sheave
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