Handy Efficient and Versatile Set of 4 Reliable 5 Inch Adjustable Brass Spring Loaded Automatic Center Punch Tools - Essential Equipment for Precision Crafting of Metal Wood Windows

[Premium Grade]: The pin of the automatic center punch is made of high speed steel that holds up to high with a hardness of 58-65° provides wear resistance rust proof and long service life. [Adjustment]: Rotate the tail of the automatic center punch to make the internal spring stretch or contract thereby adjusting the strength. [Design]: The automatic center punch adopts texture and anti-skid design. The shell is made of pure copper. It is and practical. [Use]: Thimble positioning the handle and press hard along the direction of punching. When the thimble is pressed into the handle and the internal spring ejects the thimble it can be completed. [Wide Application]: Use this automatic center punch for metal (aluminum brass copper) wood glass canvas plastic and leather materials. Also can be used as glass window breaker for emergency occasion or as spring loaded awl for belts and purses.