Grade 1 Electric Strike, Fail Secure Electrically Unlocked 12 VDC, 9-in x 1-5/8-in Faceplate, Fire Rated, For use with Rim Exit Devices on Single Doors, Hollow Metal, Aluminum, or Wood Frame, Satin Stainless Steel Finish.
They allow application of open keyways alongside restricted options to appropriately address security levels on each individual doorway yet working within a single keyway.