This bolt is a crafty little Geocache hide. It is hollowed out to hold a log sheet. The nut has a magnet glued in and it keeps it sealed. When threaded together this looks like a bolt that belongs. Attach this to anything metal and sit back and watch those favorite points add up. A great creative hide. Available in rust color, steel, antique nickel & black nickel with the Geocaching logo. All containers come with Rite in the Rain log sheet included.