This is a comb for straightening heat pump or AC coil fins. 

I made this specifically for my Daikin Altherma heat pump, but it fits any device with 14 fins per inch (1.814 mm fin pitch).

Make sure that the comb aligns perfectly with the fins before using it. Don't use force.

WARNING: Use at your own risk. You could damage the fins if you're not careful. You could also cut yourself on the fins, so wearing gloves is recommended.