1). The Core Trax are steel rails with placeable eyes that install on top of the DECKED system and give you an extra point to tie down cargo. They're a good idea if you're carrying smaller items on the regular, since the bed tie-downs are either harder to or not able to be accessed. They do require drilling for install. 2). Bed Dividers and a Dbox are included. 3). This will fit a 2005 F150 with a 6.5ft Bed, as long as it's a styleside and not a stepside bed.