Shenlong's Integral spiral blade stabilizers are from AISI4145H forging steel. The physical properties are guaranteed one inch below the surface at room temperature.The threads are systematically cold rolled to improve fatigue resistance of the connections by minimizing crack initiation.Hardbanding of stabilizers employ "pressed in" Tungsten Carbide alloy buttons.Strict ultrasonic inspections have been appied to all stabilizers to guarantee high quality