2Pcs Heavy Duty Automatic Center Punch, 5 Premium Steel Spring Loaded Center Hole Punch, Adjustable Spring Impact Center Marker Scriber Tool for Metel, Plastics, Wood, Glass.
This center punch design uses adjustable Spring Tension screw, you only need to rotate the cover to get the suitable impact strength to marking, punching and staking, accurate positioning without a hammer.
This punch is super easy to use, You can adjust the tension in the spring by twisting the top, put point where you want a mark, then depress the top end until it clicks and pops and the mark is made. It keeps the drill bit from roaming about during the initial drill process.