The SLK-F-UC-22-R1-A0-L0-4 Safety Switch with Bolting manufactured by Bernstein is a locking switch with two normally closed (NC) contacts, eight key entry slots, and a secure key cylinder lock design. It is designed for applications that require an extra level of physical security, such as securing control panels, machine control systems, and other security-sensitive areas. The integrated design of the SLK-F-UC-22-R1-A0-L0-4 features multiple contact point protection, a tamper-resistant bolt design, wear-resistant contacts, and a robust and corrosion-resistant housing. This switch meets the safety measure regulations for industrial, residential, and marine applications and is approved by international organizations including VDE, UL, CSA, CE, and RoHS.