FrostyTech posted a review on the Cooljag OAK-H2 (JAC84MC) Radial Skived Fin Heatsink

The Cooljag OAK-H2 heatsink, also known as the 'JAC84MC,' is a unique thermal solution for a couple of reasons which are not immediately obvious. The heatsink is entirely copper, constructed from a ring of skived copper fins that have been wrapped around a central copper column and soldered together. Traditionally, skived copper fins are only used in linear applications, most often long rows under a powerful fan. Owing to the demands of the socket 775 Intel processor, skiving technology has been developed to remain relevant.

Cooljag OAK-H2 (JAC84MC) Radial Skived Fin Heatsink Review