They are normally used to attach bumpers or side skirts but also engine undertrays and sill mouldings. The Civic also uses this clip to fix the grille / landing panel cover.
20x 8mm Bumper Clips- Plastic Trim Clips fits Nissan Micra Almera XTrail Juke...
20x Plastic Bumper Clips Rivet for Toyota & Lexus- Bumper, Mudguard, Arch Liner
URMECCH 20x Body Bolts M6-1.0 x 20mm Long - 10mm Hex - 17mm Washer - 20x U-Nuts Clips Engine Under Cover Undertray Splash Shield Guard Bumper Fender Liner Push Retainer Fastener, Yellow Zinc Finish
20x 10mm Dia Black Plastic Car Push Pin Rivet Fasteners Trim Clips Panel Bumper
20x 10mm Fir Tree Trim Panel Clips for Peugeot Boxer Fiat Ducato Citroen Relay
20x 10mm Hole Plastic Car Retainer Push Pin Fit Rivet Fasteners Trim Clips Panel