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Lewmar Control Thru-Deck Block - Single/Tandem - 30mm

Lewmar Control Thru-Deck Block - 30 - 40mm

Ideal for use with hand-held loads, Lewmar’s Control Blocks feature lightweight, performance loadbearing capacity. MRT (Metal Replacement Technology) and a stainless steel central race and balls provide a weight advantage, while Long Fibre Technology offers exceptional strength and durability. The open design allows sand and salt to be flushed out easily, keeping maintenance simple.


Ball bearing blocks are typically used for medium and dynamic loads in:

  • Control line applications
  • Mainsheets for dinghies and keelboats
  • Spinnaker sheets, barber haulers
  • Genoa sheets
  • Dinghy applications

Dimensions, Specifications & Weights

  • See attached images


    • Lewmar Control Single Thru-Deck Block 30mm
    • Lewmar Control Tandem Thru-Deck Block 30mm

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