Premium Material: The Bike Mount is Made of durable ABS composite material and PC material, it is strong and durable, weighing only 12.8g, It will still not affect its receiving signal. Anti-theft: The screw requires a custom wrench as it has a small stud in the middle that prevents typical Torx screwdrivers from removing it. The included security screws are long enough to accommodate most bottle cages you’ll encounter. (Torx Allen Wrench Included, don't lose it!) IPX8 Waterproof: Designed with a rubber seal ring, water will not seep through the seams and will not damage the Tile itself. Keeps the Tile clean and dry at all times. Hidden Bike Mount: The black screws and discreet placement make Tile virtually invisible on your bike. You Will Receive: 1 bracket shell (upper and lower parts), 1 waterproof ring, 2 extended M5 black safety screws, 1 wrench.Note that Bottle cage and Tile Sticker is not included The screw requires a custom wrench as it has a small stud in the middle that prevents typical Torx screwdrivers from removing it. The included security screws are long enough to accommodate most bottle cages you’ll encounter. (Torx Allen Wrench Included, don't lose it!)