Designed for harsh industrial environments or outdoor applications (safety, wireless outdoor applications, controls, etc.). Ideal for mounting circuit boards, control panels, or components mounted on DIN rails. Designed for wall mounting. The interior is secure as the cover screws are located behind the lid. Can be made even more secure when wall-mounted with security screws (tamper-proof screws). Sealed lid with a two-part "tongue and groove" design provides protection against the ingress of oil, dust, and water. The gasket is one piece and made of high-temperature resistant, U.L.-listed silicone.