These are JWICK switches, manufactured by JWK. JWICK is the English name for Dongguan Jingweike (精微科) Electronic Technology Co., Ltd. JWICK brought forth their first premium-priced line of switches. The JWICK Semi-Silent Switches are linear switches that has a unique sound signature due to its semi-silent elements. What makes this switch "semi-silent" is its ability to have a fully audible bottom-out while silicone dampeners (located on top of the stem) mute the top-out sound.