Dual Chamber Design: Dual Chamber design makes it nearly impossible for keys to fall off when clipping on and off a belt loop. Integrated Bottle Opener: We designed the carabiner to feature an extremely useful yet discreet bottle opener function. A fin is featured below the dual chamber bar that can be used to open bottle caps. The fin is curved for maximum leverage, while the chamber bar pivot is reinforced with a custom T5 barrel screw to withstand repeated use of the bottle opener. High-Grade Materials: The Ridge Dual Chamber Carabiner is available in two materials—7071 T7 aluminum and grade 5 titanium alloy—both renowned for their high durability, corrosion resistance, and strength-to-weight ratio. Purpose-driven and optimized for keychain carry, these material choices of 7071 T7 aluminum and grade 5 titanium alloy offer significantly higher strength than more commonly seen 6061 T6 aluminum and commercially pure grade 2 titanium, respectively. The aluminum variant is black anodized for added protection. The titanium variant features a stonewash finish that resists scratches and discoloration. *Not a climbing carabiner