The X-block is the right tool for anyone driving pins out of firearms. It has all the features to get the job done smoothly and professionally. The x-block has both a "V" Slot and a rounded Slot running across the face of the block to support a variety of barrels and slides. The block is made of a tough, non-marring, polymer, and edged with a softer non-slip outer overmold. The block has multiple holes to take on most any project, as well as a molded in magnet on the back side of the block to catch pins and other small parts as they drop out. Its large 5" diameter provides a stable base with plenty of support.