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Mainsheet Jammers

Our range of mainsheet jammers from Harken, Allen, Selden and Ronstan are light weight, innovative and designed to optimise mainsheet jamming.

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  • U-Adapter Assembly for 3/8 Post
    Harken
    Price: £7.55 RRP: £8.39 | Save £0.84
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  • Light Weight Swivels Fork to Short Fork
    £8.66
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  • Light Weight Swivels Fork to Fork
    £8.66
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  • Stainless Steel Universal Swivel Base
    Price: £9.57 RRP: £10.63 | Save £1.06
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  • Swivel Base Boy Fitting
    £9.71
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  • Stand Up Base, Suits S40 BB & RT Orbit Blocks
  • Stand Up Base Suits S55 BB and RT 55mm
    £14.96
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  • Swivel Base to suit BB & RT Orbit Block
    £25.52
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  • Mast Swivel RF5
    £38.66
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  • Small Comp Swivel Cleat
    £39.34
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  • 360 Rotation with Optional Stop at 45/60/80 Swivel Cleat
    Price: £39.89 RRP: £44.32 | Save £4.43
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  • Swivel Cleat
    Price: £42.05 RRP: £46.72 | Save £4.67
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  • Mast Swivel 27
    £42.17
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  • Swivel Cleat With Removable Sheave
    Price: £43.61 RRP: £48.46 | Save £4.85
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  • Small Swivel Lead with Composite Cleat Swivel Cleat
    Price: £45.11 RRP: £50.12 | Save £5.01
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  • 25 mm Low-Load Base swivel
    Harken
    Price: £46.20 RRP: £51.33 | Save £5.13
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  • Spinlock PXR Deck Swivel Cleat (2-6mm)
    £46.20
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  • Stand Up Base Adapter
    £47.32
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  • Large Swivel Lead with Composite Cleat Swivel Cleat
    Price: £47.91 RRP: £53.23 | Save £5.32
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  • Mast Swivel 38
    £48.37
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  • Spinlock Vertical Pivot PXR Camcleat (2-6mm)
    £50.92
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  • Bullseye With Swivel Base & 27mm Cleat
    £55.40
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  • Spinlock PXR Race Cleat with Swivel for 8-10mm Rope
    £56.71
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  • Small Swivel Lead with Alloy Cleat
    Price: £59.73 RRP: £66.37 | Save £6.64
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