| 摘要 |
A screw driver exclusively applied to drive a particular screw having compound drive recesses that can be driven by various conventional drivers, i.e., slot, cross, square-cross, square, and double-cross. The screw driver enables its drive bit to supply sufficiently large driving torques to the compound drive recesses of the screw and the screw driver lodges securely within the compound drive recesses of the screw as the drive bit of the driver turns.
|
