My favorite thing about these thumbie mounts is that they have a hinge that allows you to remove them without removing the brake levers and grips. They also have a built in barrel adjuster. Both of which are super clever and thoughtful extra unnecessary bits that make them well worth the extra scratch. That and they're made in California!
Available as a pair or just the left hand or right hand mount, black and silver. Sometimes we can get fun colors or polished ones if you have infinite patience.