bins of screws at a hardware store, homeowner survival skills
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8. Pick The Right-Length Screw or Nail

TOH general contractor Tom Silva's rule of thumb is to choose fasteners that are two and a half times the thickness of the material he's attaching. So ½-inch drywall gets a 1¼-inch screw, for example, while ¾-inch plywood gets a 1-inch screw or nail. Tack on another ½ inch, and angle the fastener if the base material is end grain, since it has less holding power. And, of course, always make sure the fastener won't go clear through the substrate.
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