1 Red 1 Blue plastic Glad Hand Grips Color Coded For Easy Air Line Identification Universal Design Attaches Quickly To Most Tractor Air Lines Machined Steel Core Assures Positive Connection Between The Glad Hand And Coiled Air Line 1/2" NPT Glad hand grips reduce the potential for costly and premature air line failures caused when the spring on an airline is used as a lever when coupling & uncoupling the glad hands. The grip surrounds the spring, providing extra support at the critical spring/tube connection point while serving as a comfortable handle to make glad hand connections quicker and easier.