Continuing Noctua's tradition of supplying customers with its premium-class SecuFirm2™ mountings free of charge, the NM-i20xx kit allows Noctua users to upgrade to Intel's LGA2011-3, LGA2011-0 and LGA2066 sockets. The NM-i20xx set is backwards compatible with most Noctua retail coolers since 2005* and has been designed to combine outstanding reliability, optimal contact pressure and easy, straightforward installation. Bringing the trusted SecuFirm2™ quality to Intel's LGA2011 and LGA2066 platforms, NM-i20xx is an enthusiast-grade mounting that meets the highest demands in safety, performance and ease-of-use.