Fail Safe/Fail Secure, Complete 12/24VDC Electric Strike, Surface Mounted, 3/4 Thickness, Fire Rated, Satin Stainless Steel". The 9500 Series is a 3 hour fire rated, surface mounted electric strike designed to accommodate rim exit devices with a 3/4 Pullman latch. All components are completely encased within its 3/4" thick stainless steel housing, so no cutting on the frame is required for installation. Simply place the electric strike on the surface of the frame, align it with the exit latchbolt and install. Adjustments have never been easier as the base is now separate from the cover. The 9500 exceeds grade-1 standards for strength and performance. It is field selectable for fail secure and fail safe operation, and for 12 or 24VDC. This unique electric strike complies with NFPA 80-07 guidelines for retrofit into fire-rated frames."