General description The 8-Piece Set Automatic Center Punch is a versatile tool designed for marking precise starting points on various materials such as wood, metal, glass, leather, and plastic. This spring-loaded center punch features an adjustable striking force, making it suitable for different applications, including emergency situations like breaking car windows. Technical specifications Includes 8 self-centering punches Includes 8 replacement punches Compact design for easy portability Usage Mark starting points to prevent drill or screw slipping Can be used on wood, soft metal, and glass Useful for emergency situations to break car windows Simple one-handed operation, no hammer required