The "Standard Push Pin" fastener is designed to be used with a 7/16" thick grille bar that has an inverted "T" slot cut into the end of the bar.
The pin is composed of an injection moulded plastic with a 20 guage metal nail set into the fastener that contacts the wood frame holding the grille firmly into position.
Available packaged in quantities of 12, 25, 50 or 100.