| 摘要 |
A fastener device includes a fastener member having a planar element and having a cutting member for engaging into a board, and one or more teeth formed on the planar element, one or more reinforcing ribs extended from the planar element for reinforcing the planar element, and a head formed on top of the planar element for being engaged with driving tools and for limiting the engagement of the fastener member into the board. The planar element may include two panels foldable relative to an intermediate board for forming the head and for forming a two-layer structure for the head, and may include one or two longitudinal members extended from the panels.
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