Just the thing. This Harbor Freight metal detector is designed for finding nails in boards to prevent ruining your blade when cutting. It has a tube type probe that would fit into all those crevices. At the worst, it would locate all the nails and screws and metal supports you can't see.
On sale for $14.95 (and it gets good reviews!). I have a security wand style detector like this that I bought at HF and it will find change in your pocket or nails in boards every time.
http://www.harborfreight.com/metal-detector-97245.html
On sale for $14.95 (and it gets good reviews!). I have a security wand style detector like this that I bought at HF and it will find change in your pocket or nails in boards every time.
http://www.harborfreight.com/metal-detector-97245.html