These clips are used in place of, or in combination with, deflection track.The Drift Head-of-wall Clips can be attached to the underside of structural members, concrete decks or floor assemblies. Structural attachments are positioned in the center of the slot to allow building drift. The "C" shaped end of the clip is slid inside of the structural stud and not fastened allowing for vertical deflection. Studs must be cut less than full height to enable vertical movement up to 2" (1" up and down).