#4-1/2 CARB CENTER DRILL, DRILLS AND COUNTERSINKS 82 DEG FOR 8-32 FLAT HEAD SCREW

#4-1/2 SOLID CARBIDE DOUBLE END  COMBINATION DRILL COUNTERSINK CENTER DRILL FOR #8 FLATHEAD SCREW, 82 DEGREES, 3/8 SHANK, 11/64 (.1719) PILOT DRILL DIAMETER, 3/16 PILOT LOC, 2.50 OAL, UNCOATED
Used for producing center holes, or starting pilot holes and countersinking, leading to increased accuracy.