Using your Bobrick B - 277 waste bin is a breeze. To insert a disposable trash liner, lift the LinerMate up and forward, and rest it over the edge of the waste receptacle front panel with the bottom notches engaged on the top front edge. Place the liner inside the LinerMate and fold it over the sleeve. Tie a knot in the corner of the bag, then put the LinerMate with the liner back into the receptacle. When it's time to empty, just gather the liner from the LinerMate sleeve and lift the bag up. For installation, mount the unit on the wall with four sheet - metal screws (not included) at the points marked with an S. If you're using plaster or dry wall, provide concealed backing as per local building codes. For other wall surfaces, use fiber plugs, expansion shields, 1/8" (3mm) toggle bolts, or expansion bolts. As for maintenance, wipe the satin - finish stainless steel surface regularly with a soft cloth to keep it looking good. Check the LinerMate and the bin's structure periodically for any signs of wear.