Water Bottle Cage, MaxMall 3-Pack Aluminum Bicycle Water Bottle Cage Light Cycling Alloy Cage Made of Aluminum Alloy, extra strength and durability combined with low weight, Perfect for long-term using. 6 Mounting Screws Include : The screws are standard size for water bottle mounts and bottle cage fits most water bottle cages. Special design:The bottle cage has arms that wrap around the bottle for a secure and firm hold so you don't have to worry about it falling out during your ride. Easy Installation : Use a 4mm hex key (Not included) to fasten cages in screw holes on frame. Please Note - bike frame requires threaded holes for installation of cages. Comes with 3-Pack: 3 x Bicycle Water Bottle Cage(6 Mounting Screws),Works on all road, ideal for usage by cycling, race car.