Mono coil provides greatest detection depth in most soil conditions. Solid coil design is more resistant to impact. Front half of solid coil’s top surface provides a large, flat surface to spread a handful of dirt to sift for a tiny nugget. Ideal coil for prospectors and relic hunters for improved gliding/scrubbing over brush, rocks, etc. The Axiom's Iron Check function does not work with Mono coils.
DD coils are preferred where the most severe mineral conditions exist. Front half of solid coil’s top surface provides a large, flat surface to spread a handful of dirt to sift for a tiny nugget. Ideal coil for prospectors and relic hunters for improved gliding/scrubbing over brush, rocks, etc. The Axiom's Iron Check function only works with DD coils.
