50 Pcs Upholstery Tacks Headliner Pins Clear Heads Twist Pins, Clear Bed Skirt Pins with Twist Pins for Slipcovers and Bedskirts, 0.39x0.6 Inches Bed Skirt Pins

Upholstery pins. Twist them through the headliner fabric and board to hold the fabric up. I put mine in temporarily during a drive from NC to FL last summer and they haven’t budged. https://www.walmart.com/ip/50-Pcs-Upholstery-Tacks-Headliner-Pins-Clear-Heads-Twist-Pins-Clear-Bed-Skirt-Pins-Twist-Pins-Slipcovers-Bedskirts-0-39x0-6-Inches-Bed-Skirt-Pins/19409867753