Quality Material: The trailer deck screws are made of high quality steel with excellent anti-corrosion coating on the surface, which can effectively protect the screws and prolong their service life. Wood to Metal: Reamer Tek screws are for applications where wood is being fastened to mild steel or aluminum，length of screw does NOT represent usable length of thread / thickness of wood - #12 x 2" Maximum wood depth ~13/16" - Maximum metal thickness screw can bore ~3/16" Easy Installation: In the threaded part, we added a unique threading process, which can effectively reduce the resistance when drilling screws, with the self-tapping screw tail, without the need to cooperate with the drilling of holes, can be easily nailed into soft steel or aluminum. (Note: They will not self-drill through thicker or non-soft material, these worked great best to pre drill your holes through the wood and let them self tap into the metal. ） Fragile Wings: After the wood is drilled through, the wings of the screw contact the steel and break off, then the threads engage. Wide Application: Reamer Tek screws are suitable for trailer decks, truck beds, docks, horse trailers, utility trailers, ATV trailers and more. Quality Material: The trailer deck screws are made of high quality steel with excellent anti-corrosion coating on the surface, which can effectively protect the screws and prolong their service life.