The simple design of the snap attaching tools leaves the guesswork b ehind. The three-part tool literally snaps fasteners into place with the aide of a household hammer. Includes the size 16 adapter; additi onal adapters allow your customers to accommodate a larger snap top. T he curvature of the adapters cradle the snap head to prevent crushing or cracking. The post on the tool snaps out enabling you to set a sn ap anywhere on the garment.