A buried nail is usually an unwanted signal on a coin hunt. In a reclaimed board, that same signal is the one you bought the detector to hear. The Lumber Wizard 5 makes sense for someone checking whole boards before machining: its five-inch scan width covers a face in strips, and its laser line helps you mark where to inspect.

What the light tells you

The laser marks the area that triggered the wand. It does not measure how deep the fastener lies or tell you whether it is a staple leg, a nail head or a screw. Mark the response on the wood, then approach from the opposite direction. What matters is whether you can isolate it from the bench, its metal dogs or a clamp. Wizard recommends allowing the wand to auto-tune away from large metal objects.

Material on the bench How to check it What would change my decision
Wide floorboard with visible nail holes Scan along the grain with overlapping passes, then turn the board over A second signal away from the holes deserves its own mark
Trim with broken brads or staples Move slowly across the grain as well as along it A weak, repeatable response matters even if the face looks clean
Thick beam with access to only one face Check what you can reach and mark the unexamined area A quiet surface leaves the core unresolved

Decide before the board reaches a machine

Try the detector on a loose sample fastener away from the machine. Then check both faces and the edges of the workpiece. If you extract metal, rescan the mark and its surroundings: a staple has two legs, and a broken piece can remain after one comes out. A quiet pass cannot certify wood as clear for cutting. Set questionable material aside when you cannot establish what triggered the signal.

For occasional narrow trim, a smaller handheld woodworking detector may be easier to store. For a stack of broad planks, the full-width wand gives you a repeatable way to cover each face. I would spend the money on the larger tool for that coverage and marking routine. A promised detection depth for an unspecified “nail” would tell me very little about a thin brad deep in a beam.

Manufacturer references

This is a desk review of the cited documents. We did not field-test this equipment.

Related reading: Best Metal Detector for Nails and Bottle Caps .