This is the mast foot compatible with Fiberspar Posilock extensions as well as most European extensions, as well as the new Chinook E pin system and Streamlined Euro pin extensions. If you used the chinook style cups (with two pins) you know how much of a pain it is to connect the mast foot to the extension, in particular with gloves or cold weather. The Euro Pin system uses a single large button located on the extension for effortless and secure connection of your foot to the rig. I mean the mast foot, not YOUR foot!!

Note we no longer sell fiberspar feet due to durability issues. The Streamlined foot is the best in the market.