13 Steel Pin Center Punches For Carpentry & Metal Working. This is a new set of 13 steel pin and center punches. Great for carpentry and metal working. These have knurled handles for firm gripping. Each measures approximately 4" (101.6 mm) long FindingKing works hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.