High-quality screwdriver for installing Noctua CPU coolers that use cross recess based SecuFirm and SecuFirm2 mounting systems Compatible with many popular Noctua heatsinks such as NH-D15(S), NH-D14, NH-U14S, NH-U12A, NH-U12S, NH-U12P, NH-U9B, NH-U9S, NH-C14(S), NH-L12(S), NH-L9, etc. 150mm long shaft makes it easy to reach the mounting screws of large heatsink models Magnetic tip reduces the risk of dropping screws, especially when space is tight and screws are hard to reach Large, convenient grip: comfortable to operate and helpful for applying pressure to spring-loaded mounting screws