The Stem Cap Light Mount is a great way to mount a light, computer, power meter, or GPS unit right in the center of your handlebar and stem. This part is well made, so it should last the life of your bike, also it elevates your accessory, which is great for reading a GPS or computer. They are CNC'd from 6061 aluminum and is anodized in black.
This is designed to replace the top cap of a threadless stem, this mount provides a perch for accessories that would normally mount on the handlebars. I wanted the handlebar room for aerobars, so this is especially useful if your bars are already crowded by grips, brake levers, and shifters.