Harvard Marine Seadog Plier Style Snap Fastener Tool For Male & Female Snaps for Boating Marine Upholstery Sunbrella Seating Best on Market Cast Aluminum to withstand the elements & Provide Strength Dies Included for Both Male Stud & Eyelet and Female Cap & Socket Snaps The Best tool of this type out there on the Market Handy Tool for Marine and Upholstery Repair and Construction Quickly Fix your broken Snaps!