| 摘要 |
In a universal cross-slot head screwdriver blade for use with cross-slot head screws of different size ranges the screwdriver has a cross-slot blade with cross ribs which form at the front of the screw driver blade a narrow tip corresponding to the configuration of a small size cross-slot head screw and which extend rearwardly and radially outwardly over a plurality of cross-slot head screw size ranges and which may extend radially even beyond the circumference of a shaft of the cross-slot head screwdriver blade so that the axially rear ends of the cross-slot head screwdriver blade is sized to accommodate a size range substantially larger than the front end of the cross-slot head screwdriver blade.
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