5/16-24 CARBON STEEL, HEX DIE. CARBON STEEL HEX DIES ARE GENERALLY USED FOR DRESSING OVER BRUISED OR RUSTY THREADS, THEY ARE THE MOST COST EFFECTIVE RE-THREADING TOOL AVAILABLE. NO SPECIAL HOLDER IS REQUIRED TO APPLY THIS TYPE OF DIE. AN ADJUSTABLE WRENCH, AN OPEN OR BOX END WRENCH, OR A PROPER SIZE SOCKET WILL DRIVE THIS TOOL. THESE DIES ARE IDEAL FOR MAINTANCE IN THE SHOP OR FIELD.