Armstrong Mast Bottom Bracket The Armstrong Mast Bottom Bracket is a precision-machined component built to the same high standards as the rest of the Armstrong Alloy System. Inspired by SailGP race technology and crafted from aerospace grade aluminum, it connects your mast and fuselage with a solid, reliable fit that holds up over time. All hardware is titanium and surgical stainless steel, keeping the overall weight low and corrosion resistance high. Tight manufacturing tolerances ensure a clean, precise connection with no unwanted flex or play exactly what you want from a critical part of your foil setup. Features: SailGP inspired design machined from aerospace-grade aluminum Titanium and surgical stainless hardware light and corrosion resistant Industry leading manufacturing tolerances for a precise, secure fit Durable and low maintenance Part of the Armstrong Alloy System.