Cal Royal AT-ICENTOOL-US26D Exit Device Entrance with AT Lever trim has an Interchangeable Core which accepts 6 or 7 Pin Best, Arrow and Falcon cores and comes in US26D Satin Chrome Finish.The Cal Royal AT- ICENTOOL-US26D Exit Device Entrance Lever trim is for use with Cal Royal 2200 Series Exit Devices and for 1 3/4'' thick doors.