Have great gripping power under load, whilst still allowing the rope to be released freely when required. They are ideal for allowing the crew to hand hold main, jib and spinnaker sheets and ease sail safely.

Featuring specially designed sheaves manufactured in aluminium, hard anodised, combining high strength and corrosion resistance.The sheaves run on twin races of precision ground Delrin ballbearings for minimum friction under high or low loads.

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A 'Planar' switch system is used to allow easily operated on/off selection of ratchet mechanism with cold, wet or gloved hands, even under load.

The series includes a reverse action / rotation single block which when paired with a standard model always have the switch facing the crew, ideal for jibs and spinnaker sheets.

Standard models, single, (and Becket), and fiddle are all available with adjustable cam cleat arms. Low profile purchase systems (up to 6:1) are achieved by incorporating R5638 with the Macro series of ballbearing blocks. The 76 incorporates the big Servo Cleat.

Ratchet Blocks operation protected by Patents 2181801 and 977795.