A small thumb wheel on the side lets you adjust the zip tie’s clamping force from "loose bundle" to "industrial shear." Original models only had on/off locking.
In many developer circles, "Kt" stands for a customized kernel toolkit or a carrier-specific optimization set. It ensures that the Zipset is compatible with network protocols (CDMA, LTE, 5G) used by Korean carriers but is often adapted for global Samsung devices. Kt So Zipset 8 UPD