Product DescriptionElectric Door Release 16VAC-Fail Secure Electric Strike For Aluminum Jambs, 16 Volt, AC Intermittent, Fail-Secure, Satin Aluminum, 1.06"" Lip ExtensionElectric Door Release 16VAC-Fail Secure electric strike is specifically made for aluminum narrow stile door openings and jambs where remote electrical control is needed.