Von Duprin 996L Exit Device Trim Night Latch Mortise Prep 06 Lever Style Satin Chrome Left Hand Reverse Pack_of_50 slide the punch through the slide the punch through the hole and tighten down the hex nut with a 11 16" wrench or socket set Hole size Punches a DOUBLE "D" hole size approximately 7 8" wide by 1 1 8" high For use with 1 1 8" diameter Olympus cabinet locks 720 The RCI 9212 keypads support up to 120 users and ensures that programming remains intact with EEPROM memory even when the unit is not powered Hand: Suitable for left hand reverse doors It features a Breakaway design that is especially effective in areas where vandalism to door hardware is a problem