MEC is known for making high-quality shotshell presses that work great for all levels of shotshell reloaders from beginners just learning this skill to advanced loaders who have been reloading for decades. These wad guide fingers hold the mouth of the shotgun hull open while the wad is inserted. The wad is slid down the inside of the guide so that it doesn't catch on the edges of the hull, resulting in a crushed wad or hull. Seasoned reloaders know that broken wad guide fingers shut down a reloading session. Be prepared for any breakage by keeping a spare or two on the reloading bench. This factory replacement part only fits the presses that are listed in the item description.