Marson MTS Series Thread-Sert fasteners have a small flange, a splined body and a 360 degree swaging action as the the Thread-Sert expands inside the hole during installation. Thread-Serts provides high resistance to torque-out with minimal backside protrusion once installed. They can be installed in a blind hole, ( no access to back side of panel is required), with an unlimited maximum grip range. May be installed with all Marson pneumatic and manual Rivet Nut tools. Available in Steel-Zinc Plated or Aluminum.