The SportStar Chinstrap Adapter for Riddell SpeedFlex is an easy way to convert your SpeedFlex helmet to a traditional Snap Post system--without drilling! To install, simply unscrew the thumb screw from behind the SpeedFlex ratchet housing, remove the SpeedFlex ratchet housing from the helmet, place the SportStar Adapter in the same position and lock it into place by finger tightening the thumb screw already provided with the helmet. Watch video below for full install. - MATERIALS: 2 SpeedFlex Adapter Units - INSTALLATION: Simple Screw-In Mechanism - COLORS: Available in either White or Black - DOES NOT COME WITH THUMB SCREWS