This professional-grade tool, with stainless-steel prongs to break down tough meat fibers, provides controlled, uniform meat tenderizing. You can also use it to pierce meats before they're marinated so flavors penetrate deeply. The 2-inch-diameter plastic disk on the bottom is spring-loaded. It provides precise control when the tenderizer's handle is pushed down, so the prongs pass through the disk's holes and into the meat. When you release downward pressure, the handle springs up again, poised to tenderize another section with the same smooth, uniform action.