Wrench support rack assembly with a fastener device

A wrench support rack assembly comprising:

• a support rack including a base with two opposite sides, and left and right side plates extending respectively and uprightly from said opposites sides of said base to define a wrench-receiving space therebetween;
• a retention cover having a pivot end mounted pivotally on said left side plate, and a distal end opposite to said pivot end, said retention cover being rotatable relative to said left side plate between a covering position, in which said distal end of said retention cover moves toward said right side plate so as to cover said wrench-receiving space, and an uncover position, in which said distal end of said retention cover moves away from said right side plate to permit access to said wrench-receiving space;
• and
• a fastener device including a flap flexibly connected to said distal end of said retention cover, a first latch arm extending transversely from said retention cover adjacent to said distal end, a second latch arm extending transversely from said flap, a first latch groove formed in said right side plate and engaging said first latch arm when said retention cover is disposed at said covering position, thereby preventing upward movement of said retention cover relative to said support rack, and a second latch groove formed in said right side plate, spaced apart from said first latch groove, and engaging said second latch arm when said retention cover is disposed at said covering position, thereby preventing sidewise movement of said flap relative to said right side plate of said support rack, said first and second latch arms being transverse to each other when said retention cover is disposed at said covering position.