| 摘要 |
The present invention relates generally to a security screw (1) having threaded shank portion (2) and head portion (3). The head-portion (3) is characterized by having a circular profile with a cylindrical peripheral wall (4) and a smooth crown (5) without any tool engagement slots, recesses or other profile in contrast to a convention screw. The security screw (1) is driven into place by way of a driving tool (9) having shank portion (10) adapted to be rotated by a suitable implement such as a power drive. The driving tool (9) further comprises a cup portion (13) incorporating a cylindrical recess (14) coaxial with the shank (10). The recess (14) is sized and shaped to fit over the head portion (3) of the screw (1).
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