The NM-I3 SecuFirm2TM Mounting-Kit makes all Noctua CPU coolers compatible with Intel"s LGA1156 & LGA1366 sockets for Core i5 and Core i7 processors. Designed to combine outstanding reliability, optimal contact pressure and easy, straightforward installation, SecuFirm2TM is an enthusiast-grade mounting system that meets the highest demands in safety, performance and ease-of-use.