Keep your chainrings securely attached for optimum performance by regularly updating your chainring bolts. Produced specifically to service Praxis Works chainrings this 5xPack Aluminium nut and bolt set with Allen tool receptacle (5/6 mm) enables the mounting of two chainrings to keep your drivetrain running at maximum efficiency. The smart looking laser-etched logos on the black anodised finish will compliment your new Praxis Works rings perfectly too.