This keycap set has a large number of personalized Complement keys, You can use them to assemble different styles of keyboards according to your ideas. When you are tired of a color style, you can change several of the keycaps to change your keyboard to a new style. Specification: Spacebar: 6.25U + Extra 2.25U (left), 2.75U (right) +7U+6U/ Shift: 1U+1.75U+2U+2.25 +2.75/ R1 FN: 1.25U + Extra 1U / R1 Alt: 1.25U + Extra 1U +1.5U/ R1 Ctrl: 1.25U + Extra 1U +1.5U/ R1