Check the listing for details. Swage Tool --20 ga. shot-shell ---Removes-reduce crimp swell after reloading. Color: Silver, Condition: New. Listed at 12.95 USD. Swage Tool 20 ga.(free shipping) Reduces or removes Crimp swelling at the case mouth after reloading The more you reload the same case, the weaker the crimp fold becomes. Often this causes the case mouth to develop a swelling or bulge at the crimp fold. This is especially important in reloading for a semi-auto shotgun.Minimizing the bulge helps chambering smoother and more reliable when using reloads. A great accessory for shot-shell reloading.This tool comes as a standard component in the Survival Loader kits mfg by; The X Ring USA INSTRUCTIONS FOR USE:After reloading the shell; Hand-Push the case mouth into the "grooved end" of the Swage Tool. ( do not hammer on a loaded shell - use hand pressure only ) The internal bevel will reduce or remove the bulge-swell at the crimp line.CNC machined for quality. Free & fast shipping to addresses in the USA (includes Hawaii & Alaska) We ship in 3 full business days, regardlessof what Ebay shows as shipping time.(excludes weekends, holidays)**********If you are unable to make an International purchase through Ebay; please contact the manufacturer.The X Ring USA (search on google) They ship to authorized countries.(several countries will not allow this product to be imported)