brad,
Its a kit that allows you to tell if a metal is gold(and what karat)silver and platinum.It includes the solutions,scratch stone,loupe,scale,files,electronic diamond tester and calibration weights for scale.It will pay for itself in no time.
Sometimes items are marked as one thing but really are something else,I have sold over 14oz of sterling slag from one site this winter(whole other story)that I wouldnt have thought were silver...ya never know.
good luck,happy hunting
pat