If you hunt heavy saltwater surf and want dual-frequency stability and tone ID

a frequency that excels on sub-gram gold in shallow soil and exposed bedrock

Coil: 5-inch DD search coil

Beach and shallow-water hunters use the AT PRO for surf-zone jewelry recovery and swimming-hole coin shooting

Minelab M8 8x5.5" DD Waterproof Search Coil (Manticore) minelab-accessories If you hunt heavy saltwaterMINELAB 8 x 5. 5 M8 DD Waterproof Coil for Manticore Metal Detector The waterproof 8 x 5. 5 inch elliptical Double D coil provides maximum depth for specialized treasure hunting. It is also great for wide ground coverage in open spaces. A protective skidplate is included. Features 8 x 5. 5" Double D coil provides maximum depth for specialized treasure hunting Waterproof DD Configuration Good Stability and Depth Supplied with Fitted Skid Plate & Coil