Metal comb from BaBylissPRO with a slick flat services making it ideal for "clipper-over-comb" use.
You can make a very precise cut, very close to the head.
A good assistant for making a fade.
The downside is that the comb doesn't flex.
BaBylissPRO - Metal Comb - Gunsteel Grey
M3842E - Gunsteel Grey