The DS211 red round button switch with lock is a selflocking control designed for panel mounting. This single piece device features a red round push button with a small key hole for the lock and uses a 10 mm mounting hole. Key attributes Model: DS211 Color: red Shape: round Function: selflocking push button switch Lock: keyed lock with small key hole Mounting hole: 10 mm Quantity: 1 piece Material: not specified Performance: designed for reliable latching action Compatibility: suitable for panel mounting with a 10 mm mounting hole Benefits and features Selflocking operation provides a latched on state until the key is used to unlock, helping prevent accidental reactivation. Keyed lock adds a layer of security, ensuring only authorized personnel can reset or reengage the switch. visibility red color makes the control readily identifiable on panels and equipment. Compact round design with a 10 mm mounting hole supports use in spaceconstrained panels and assemblies. Sold as a single piece, aligning with applications that require a dedicated, keyed, selflocking button switch. Applications Panel control on industrial equipment where restart after maintenance must be authorized. Safety interlock or authorization point on machinery to prevent unintended operation. Prototyping or DIY projects that require a keyed, selflocking push button switch for controlled access. Notes Material is not specified in the provided information. The description reflects the model DS211 and its listed features without additional modifications.