[HEAVY DUTY NON-SLIP GRIPS] - Extension handles made of heavy duty machined aluminum. Our handles are more durable and do not break easily. The one-piece body made of heavy duty anodized aluminum is more and corrosion resistant than cheaper plastic models. [EASIER TO USE] - Gladhands extension handles are installed between the handbrake and air brake lines. Gives the driver more gripping area, more labor-saving. Our wide hexagonal handles provide a better grip than small cylindrical handles and provide greater leverage to make coupling/uncoupling air lines easier. [NO-LEAK] - Leak-proof rubber on the handle threads. ensure that the gladhands are tightly connected under strong air pressure. that many other handles do not, and the main cause of air leakage. [Size and Color] - 1/2 NPT Thread - Handles port size. Color-coded red and blue handles for easy identification of emergency and service line. [Widely Used] - Replaces for 12-600, etc. The general can quickly connect to most trailer