🚲 CONVERT ANY BAG INTO A BIKE PANNIER : Make your DIY pannier dream comes true with this pannier clips hardware. If you already have a backpack or a tote that you like, you can turn them into a bicycle pannier with secure attachment. 🚲 ALL HARDWARE REQUIRED PROVIDED : This upper part set includes 2 hooks , 4 bolts and 4 nuts 🚲 EASY TO INSTALL : First, make holes in your bag for the rails. The bag should have a rigid panel to stay in shape once installed. It also has a plastic cushion to protect your bag's contents from the nuts and bolts of the pannier hooks. 🚲 ENGINEERED TO ENDURE : Vincita pannier attachment system is made with sturdy nylon 6 plastic, which is tough and durable for all your biking conditions. 🚲FOR RACK DIAMETER UP TO 0.5" : The hooks are suitable for rack diameter size up to 0.5" / 13mm.