They secure with little hassle or little chance of coming undone once pushed together firmly. Simply drill correct hole size in mudguards and mud flap and push the two parts of this push rivet together to secure the mud flap to the mudguard.
Deluxe Front Bicycle Mud Flap Unbranded
Bicycle Mud Flap Nut & Bolt fixings
Deluxe Bicycle Mud Flap Set Unbranded
Unbranded Bottle Front Bicycle Mud Flap
SKS Spoiler XXL Mud Flap 35mm Mudguard Part - 11070
Unbranded Ext Front Mud Flap