Insulation stud

A retainer assembly for securing a sheet-like material to a wall comprising an elongated stud having an inner end adapted to be welded to said wall and extending outwardly therefrom so as to be perpendicular to said wall, said stud having a pointed outer end whereby said sheet-like material can be impaled thereon and positioned so as to be adjacent said wall, said stud being provided with a longitudinal slit extending from the outer pointed end to a location adjacent the inner end so as to form a pair of longitudinal fingers, said stud being bent adjacent said location whereby said fingers are laterally offset from each other, said fingers being provided with alternate outwardly extending teeth and recessed notches along the longitudinal sides of the fingers opposite from said slit, and a thin flat plate provided with a central opening therein such that the pointed end of said stud can be inserted through said central opening to permit the plate to be slidably received on said stud, said central opening in said plate being formed by a pair of rectangular openings laterally offset with respect to each other and overlapping, the maximum dimension of the opening across the opposite ends of the rectangular openings being approximately equal to the distance between the notch on one finger and an opposed notch on the other finger, whereby, when said plate is urged in a direction from the pointed end of the stud towards the inner end thereof, said fingers will move in a scissors fashion as the plate passes over the teeth on the fingers, and whereby, when the plate comes to rest in a desired position in a pair of opposed notches on the fingers, the fingers will spring back towards their original disposition to lock the plate in the desired position.