Great in larger parks. It's the only coil I use in Tot lots for really fast coverage. A lot of jewelry was lost during the past several years and is still shallow. Finds coins and rings down to 4 inches deep. Have one for my Vaquero and one for the Cortes. The depth ID shows deeper so I inore it. When searching deeper I use the stock coil, but for the shallow jewelry the 3 x 18 lets me cover a lot more ground in the same amount of time.