The Lift Safety DAX Chin Strap allows for a more secure fit of your DAX hard hats and prevents the hard hat from getting bumped off, blown off from high winds, or falling off in confined or unusual work positions. The magnetic clip makes it easy to take on and off and the mounting anchors slide under the top side of the rivets for a secure hold. It offers maximum adjustability from 1.5" to 11" and is a great accessory for your Lift Safety DAX hard hats.