These are JWICK switches, manufactured by JWK. JWICK is the English name for Dongguan Jingweike (精微科) Electronic Technology Co., Ltd. JWICK Splash Brothers are inspired by a dynamic duo. They feature an incredibly short actuation distance of 1.0mm with light spring (48g), and a carefully applied thin coat of factory lube. These features allow them to be exceptionally quick, and smooth. When milliseconds count, these switches will prevail.