Chipboard Screw Flat head，Coarse thread

Furniture Screw

Concrete Masonry Screw

PVC Window Screw Drill Point，With Nibs Under Head

Wood Construction Screw，Wafer Head Type-17 slotted

Roofing Screw，Flange Washer Head Double Thread

Durock Screw with ribs

Fermacell Screws, High-Low Thread, Sharp point，with nibs