Custom fit Replacement Headgear for F400, F500 Series ORS NASCO Wrench Hook Jaw is a Wrench Hook Jaw is a genuine Ridgid® part for steel or aluminum pipe wrenches Its teeth provide a strong and taper length for the perfect alignment Black oxide finish for additional rust protection pliable headband fits head contours comfortably Overhead band with multiple adjustments helps position the glassholder for the best view of the weld and a comfortable working position Exclusive “free floating” arms balance and stabilize the helmet while minimizing pressure points Strip proof ratchet head size adjustment provides small increment sizing Deeply offset