Mast Bases
European pin or Traditional base-cup?

EX Power-Haul Extensions
European pin attachment format. Solid one-piece stainless steel tendon cup and pin.No joint to fail. Quick release button. Available on all extensions and bases.

US Power-Haul Extensions
Traditional base-cup with spring pin attachment format. Available on all extensions and bases.
Products (8)
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Chinook Carbon Extensions Short Medium Tall
Our lightest extensions come with the sleek new 2008 design adjusting collar and are stronger than ever with reinforced sidewalls. All come with the proven US Power-Haul pulley and cleat system and cm index markings. 2 cm adjustment increments.
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Aluminum Extension Short Medium Tall
The sleek new 2008 design adjusting collar and anodized logo/index markings are some of the unique and innovative features that make these the most popular extensions on the market. Standard with the proven US Power-Haul pulley and cleat system and 2 cm a
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One-Bolt
Tendon joint provides excellent performance and is easy to replace. This unique design is very low to the deck with four finger ribs for easy adjustment. $169
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One-Bolt
Tendon joint provides excellent performance and is easy to replace. This unique design is very low to the deck with four finger ribs for easy adjustment. Solid Investment Cast Stainless Steel EX Pin and Caps. $170
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Two-Bolt
Rubber joint provides shock absorption in choppy conditions. This proven design incorporates a built-in wrench for baseplate adjustment and a safety-lock mechanism. Indisputably the most dependable and easiest to use base available. $164
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Two-Bolt
Tendon joint provides excellent performance and is easy to replace. This proven design incorporates a built-in wrench for baseplate adjustment and a safety-lock mechanism. Indisputably the most dependable and easiest to use base available. $195
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Two-Bolt
Tendon joint provides excellent performance and is easy to replace. This proven design incorporates a built-in wrench for baseplate adjustment and a safety-lock mechanism. Indisputably the most dependable and easiest to use base available. Solid Investm $194
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Euro-Pin conversion cup
Converts pin style bases to the US standard Chinook cup. Cup Conversion cup $37
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