4oz, 2oz & 1oz 421 WEIGHT SYSTEM (412W). THIS SYSTEM IS MADE OF STAINLESS STEEL, IT COMES STANDARD ON THE PLATINUM HI-MOD STABILIZER BUT WILL WORK ON ANY DOINKER SUPREME. IT HAS A VERY LOW PROFILE WHICH ALLOWS YOU TO STACK ON MORE WEIGHT PER LINEIR INCH. THE 421 WEIGHT SYSTEM ALOOWS YOU TO ADJUST IN 1oz INCREMENTS. THIS IS THE WEIGHTS SYSTEM OF PRO ARCHERS WORLD WIDE.