#6 of 8 BEST PLANNED WORK TRAILER. Each bin is grouped for a category of hardware or fasteners such as DECK SCREWS (all sizes), CABINET (pocket hole, 2-1/2" cabinet, 5/8" drawer screws, etc.) PLUMBING, ANCHORS BLUM hinges, ROOFING NAILS , etc. I've seen guys use individual cups or jars for each screw or nail, but that keeps you running back to the trailer with a hand full of jars. Mobile tool storage.