These worked perfect for mounting an extra pair of lights on my 2016 Yamaha YZF-R3 sport bike for better visibility. They look a little flimsy at first glance but they're actually quite strong once mounted. They're easy to adjust for aiming the lights and I'm confident they'll stay in position. They're also easy to remove if you need to take them off for some reason.
I mounted them onto my bike's front fender bolt holes. I've attached a photo showing how they look with a set of lights bolted on. These lights aren't included, I bought them separately.
Make sure to have some extra bolts on hand since the ones included may not fit your bike. If I remember correctly, the package included a pair of M8 bolts while my bike requires M6. Maybe consider using some threadlocker to ensure they stay good and tight. Also keep in mind that some places restrict how many headlights can be mounted on a road vehicle; in Ontario the limit is 4 plus 2 turn signals.