Patent ID: 6886431

Claim:
A fastener in combination with a driver, comprising: a) a screw comprising: i) a head; ii) a blind slot extending diametrically and completely across said head, said blind slot defined by a floor and a pair of substantially parallel spaced-apart walls separated by a substantially constant width; and iii) a blind bore drilled through said floor between said pair of substantially parallel spaced-apart walls and extending downwardly into said screw, said blind bore having a substantially circular lateral cross-section with a diameter less than said substantially constant width separating said pair of substantially parallel spaced-apart side walls; and b) a screw driver flat blade tip comprising: i) a rectangular-shaped bottom surface having a thickness less than said substantially constant width separating said pair of substantially parallel spaced-apart side walls; ii) a first pair of opposing surfaces extending upwardly from said rectangular-shaped bottom surface and tapered toward said rectangular-shaped bottom surface; iii) a second pair of opposing surfaces extending upwardly from said rectangular-shaped bottom surface; and iv) a projection extending downwardly from a central portion of said rectangular-shaped bottom surface and formed by removing material from said screw driver flat blade tip, said projection comprising a first pair of opposing surfaces which are continuous and coplanar with said first pair of opposing surfaces of said screw driver flat blade tip, a free tip, a second pair of opposing surfaces tapering toward said free tip, and a square lateral cross-section adjacent to and forming four shoulders with said rectangular-shaped bottom surface, said square lateral cross-section having a diagonal length equal to or less than said diameter of said blind bore; wherein said screw driver flat blade tip releasably engages said head of said screw in a manner so as to prevent said screw driver flat blade tip from sliding off said head as said screw driver flat blade tip drives said screw.