The 10″ X 14″ PROformance Power DD Searchcoil is an excellent addition to the Garrett GTI 2500 or GTI 1500! This searchcoil is for use in areas with heavy to moderate mineralized soils. Use the 5″ X 10″ DD Scorcher Searchcoilto find smaller targets, such as tiny gold nuggets, in moderate to heavily mineralized soils. read more