Gateron Optical Brown - Tactile 2mm Pre-Travel 4mm Total Travel 55cN Actuation For Hot Swap Optical Mechanical Gaming Keyboards & DIY Custom Keyboards. Tactile: for tactile responsive typing and gaming ; used by some of the world's best gamers Optical switches ; 1-pin design ; Compatible with Optical PCB Only; Plate Mounted Rated for 100 M Actuation. Switch Remover / Puller Included!