General Purpose Self-centering punch is the tool you need to create an indentation in working materials to help screws and bits stay in place and resist center drift of your drill. It is very useful when working with delicate works or important constructions. It is also not specific to professionals; it is also ideal for drilling jobs around the house. Product Features It is equipped with an adjustable pressure screw. Simply loosen the screw at the top of the punch. This will allow you to control the striking pressure of the double spring cylinder and give you the correct impact no matter what material you are using. By having this adjustable pressure, you can create notches in harder materials and conversely release the pressure for softer materials. Durability The tip of this automatic punch is made of high-quality steel. The idea with any tool is that you want it ready to go when you need it. Thanks to its high-speed steel tip, it will survive all the different jobs you can throw at it. The handle has an integrated knurled grip to prevent slipping during use, providing stability and maneuverability. Precision Each punch is machined to exact specifications, so you're ready to create your notches with every job. Features a textured handle for added stability and maneuverability. Typically used to mark the center of a point, the small dimple guides the bit tip and prevents slippage or deviation that causes damage. Suitable for drilling the steel plate, wooden board, and other materials to place the holes. An automatic punch is a hand tool used to produce a dimple in a part. It performs the same function as an ordinary punch but without the need for a hammer. When pressed against the workpiece, it stores energy in a spring and eventually releases it as an impulse which drives the punch, producing the dimple. The impulse delivered to the punch is quite repeatable, resulting in consistent impressions. Features: Tip Material: High Speed Steel Handle Material: Brass or Carbon Steel Tip Hardness: HRC58~65 Length: 130mm / 5.12" Handle OD: 13mm / 0.51" Color: Gold, Silver (optional) Quantity: 1 Package includes: 1 Automatic center punch