6 star metal
basically only good for 'block' items. chess set pieces with thin legs break easily. extended rifles break easily. anything with thin appendages break easily. hanger rings on christmas ornaments break relatively easily. for chess sets with thin leg items or extended appendages like the eagles on top of flags on drums (the 'castles' on some sets) i use the 5 star metal or the model medal. the model metal is the best stuff for casting but the lead is a problem. even being somewhat careful my lead was 16. after a year and restarted casting with the leaded stuff and trying to be very careful my lead level was still a 6. i wish there was a metal that was not leaded that worked just as well as the leaded