✔️ Coil measurement: Typically with coil size, the bigger the coil, the deeper and even more sensitive a steel detector are going to be. This may appear that greater is best, but substantial coils are generally less delicate to more compact targets plus more in danger to electromagnetic interference (EMI), https://edwinpygpy.thezenweb.com/metaldetector-can-be-fun-for-anyone-66767749