I would steer clear of the 13" coil--- heavy and really for the money spent,, better coverage is about all you get.
11" coil for relic hunting in open fields= tops.
9" for the real bad areas for nails and iron,, but 11" sure ain't no slouch.
11" coil for relic hunting in open fields= tops.
9" for the real bad areas for nails and iron,, but 11" sure ain't no slouch.