Patent ID: 7588402

Claim:
A screw with removable element comprising: a shank having a shank body, a first threaded section helically disposed on said shank body, a head disposed at one end of said shank body, and an end face disposed at the other end thereof opposite to said head, said end face having a recess defined therein; and a tip section having a tip body, a drilling portion disposed at one end of said tip body, and an insertion coaxially extending from the other end thereof to be inserted into said recess to abut said shank on said tip section; wherein, said first threaded section having an upper threaded section located adjacent to said head and a lower threaded section located adjacent to said end face; said tip section further having a second threaded section spiraled round said tip body and disposed between said drilling portion and said insertion, said threaded sections having the same pitches and respectively having outer diameters, said outer diameter of said upper threaded section being greater than said outer diameter of said second threaded section, and said outer diameter of said second threaded section being greater than said outer diameter of said lower threaded section.