| 摘要 |
A combination fastener driver and fastener, the fastener driver including a generally hourglass-shaped tip which flares from the shank to the tip and the fastener includes a generally hourglass-shaped slot in the fastener head with under cut side walls. The flared walls of the driver tip engage the undercut side walls of the fastener slot to lock the tip in the slot when driving the fastener. A waist portion in the driver tip engages a waist portion in the fastener slot to prevent the tip from laterally slipping out of the slot during use.
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