PM3RM remote driver housing for Solid State (BKSSL®) Power of 'X' fixtures in three distinct mounting conditions: Recessed Junction Box, Surface Mount and Tree Installation. Made from copper-free, aluminum extrusion with die cast end caps. UPM™ features a Patented Knockout™ Design (6,940,012 B2) allowing for knockout re-insertion without compromising seal integrity. Fixture must be specified separately.