QX2 Mechanical Switch Steel Series QX2 mechanical RGB switches are engineered for pure performance. The QX2 switch features copper click leaves, clear casings & DURACON thermoplastic stems, to deliver silky smooth linear operation. Their 45c N force & 2mm actuation point is the holy grail for players looking for the absolute fastest reaction times. Guaranteed for 50 million key presses, insuring a lifetime of durability. 5000 Series Aluminum Alloy Building gaming’s first mechanical keyboard is a key part of Steel Series history, & the Apex M750 honors that legacy by staying true to our original mantra: built like a tank. The keyboard’s frame is built with aerospace aluminum to provide a rock-solid base for the mechanical switches. The use of of series 5000 aluminum alloy, gives the Apex M750 zero-flex stability.