The mini-flange slot's 1/8 in flanged edge nearly disappears for a clean 'line of light' look. For slots that don't go floor to ceiling, use the PE-SLOT-END to finish the edges. The insert also fits into the 1/2 in or 5/8 in drywall slot extrusions to build a sleek, finished 'slot' fixture that's modern and stylish. Three pairs of clips per meter are needed to secure two parts together and the lens snaps on as the final piece. The drywall slot is designed for both 1/2 in and 5/8 in drywall used for new construction. The two-piece design: first the drywall slot rough-in housing for either drywall thickness is installed (with the PE-FC-END if the slot goes floor to ceiling) then the mini-flange slot insert snaps after texturing and painting.