Item Type: Center Punch Bit Material: Alloy Steel 120PCS IN 1 SET: Including 20pcs center punch replacement bits, with standard size, can directly replace old or damaged center punch bits. 2EASY OPERATION: These center punch bits can be used with circlips, plug and play, which can ensure good stability and safety in drilling operation. 3ALLOY STEEL: These center punch heads are made of alloy steel material, which has high hardness and wear resistance and is not easy to deform. 4STANDARD SIZES: The center punch bit has standard diameter and length, which can be directly installed on suitable center punch, stable and reliable. 5MAIN FUNCTION: Use the punch tip to make dots on the workpiece as marks for the center of the circle or other points and lines, convenient for drilling.20 x Center Punch BitPay attention to safety protection when using it.