Please find attached Dial Test Indicator. I want to replace the contact point of Dial.
Can anyone suggest me what type of Wrench (or key) is used to remove the contact Point.
A small stamped open end wrench should have come with your indicator. In a pinch you could use a pliers with smooth jaws. If you don't have the wrench you should contact the manufacturer of your brand of indicator and get the correct one for your tips.