"JK1XBSP (Single-Pole End Stopper) The JK1XBSP is a mechanical end stopper designed for DIN rail-mounted circuit breakers and other electrical components. It prevents unintended movement of electrical devices, ensuring stability and secure positioning. Category: Electrical Panel Mechanical Accessory Material: High-strength thermoplastic with metal clamping mechanism Application: Used for securing circuit breakers and terminal blocks on DIN rails. Provides vibration resistance and mechanical stability. Ideal for electrical panels in commercial and industrial installations."