The Trek Thumb Screws, Pack of 4, allows you to enjoy a tool-free biking experience, uniquely designed to facilitate seamless mounting of bags onto your Trek bike. These screws possess an M5 thread size, with a 0.8mm thread pitch, making them suitable for bikes comprising integrated frame mounts. Moreover, measuring 12mm long with an expansive 22mm-wide head, these thumb screws are designed to ensure maximum ease-of-use and utility. As these screws are hand-tightenable, they offer an efficient and effortless means to mount and dismount bags from your bike frame, letting you take your essentials along on your ride, hassle-free. Notably, aside from being perfectly suited for Trek bikes, the high adaptability and compatibility of these thumb screws also make them compatible with most other bikes that feature integrated frame mounts. Ready to embark on your next biking journey with your essentials in tow? Ditch the traditional tool-dependent mounting methods and let the versatile Trek Thumb Screws guide you. And don't stop here. Explore a wide range of bags tailored to complement your bike setup and meet your specific storage requirements.