Having the right tool for the job makes any gunsmithing project so much easier! Without the right tool, you may damage fine finishes or break parts. 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. 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. a Large 5" diameter a Magnet molded into base to catch pins or small parts a Made of tough, non-marring polymer a "V" slot and rounded slot run across the block face to fit most every need such as pistol barrels, slides and frames