The 4612 Power Transfer Device channels electrical wiring from the door frame into the door itself. Designed for use with locks, exit devices, and more on doors hung with butt-type hinges. Function: Provides a secure and unobtrusive means of channeling electrical wiring from the doorframe into the door itself, for powering electric strikes on the inactive leaf of a pair of doors, locks, exit devices, etc. Suitable for any door hung with butt-type hinges, including continuous or pivots offset 3/4" [19.1 mm] or less. Not compatible with center-pivot doors. This listing: part 4612-1 105 DGR SWING, in 612 Satin Bronze finish.