Patent ID: 6887023

Claim:
A screw with protruding sheets on a drilling head portion thereof, the screw comprising: a thread portion; a screw tail at one end of the thread portion; a cruciform slot formed on the screw tail; a plurality of screwing sheets formed at another end of the thread portion; a plurality of recesses formed between the plurality of screwing sheets for removing undesired pieces; the drilling head being formed at front ends of the screwing sheets; the drilling head formed with a plurality of protruding sheets which are made of soft metal, wherein the protruding sheets are axially arranged, and each protruding sheet is protruded with a buckle at a position near the screwing sheets; wherein by screwing the screw by rotating from the slot, the screw will rotate so that the screw drills a hole and enters into a wood plate; then the protruding sheets will enlarge the hole; the undesired wood pieces are removed from the recesses; when the screw further drills into a metal plate, the protruding sheets will be worn out because the protruding sheets are made of soft metal.