The GT style stem from back in the 80's. Since the GT ones are not all that easy to come by these days this may be your way to score that last piece you need for your retro 80's build. Fits 1" threaded forks. It has a hollow expander bolt that allows you to run a brake cable thru it to set up your Gyro Rotor. This is a nice low cost stem that will get the job done on most old school bike builds. Features: Fits 1" Threaded forks Hollow expander bolt