<br><b/> <br><b/>Specifications: <br><b/>Material: copper <br><b/>Diameter: approx. 9.5 mm/0.37 inch <br><b/>Each set of prong snaps consist of: 1 piece male snap, 1 piece female snap and 2 pieces hollow prong eyelets <br><b/> <br><b/>Package Includes: <br><b/>200 sets hollow snaps (10 colors, each color 20 sets) <br><b/>1 x transparent storage box <br><b/>2 x spare rubber mat rings <br><b/>1 x pliers <br><b/>1 x force bar <br><b/> <br><b/> <br><b/>Precautions When Using: <br><b/>1. For each snap set, you wil need 1 piece male snap, 1 piece female snap and 2 pieces hollow prong rings. <br><b/>2. Put the hollow prong rings on the pliers lower side without hole, and the male & female snaps on the pilers upper side with hole. <br><b/>3. Choose your spot to install the snap, please ensure the snaps face cloth inside & outside as the picture. <br><b/>4. Insert a color hollow prong ring and a male snap into the pliers. Repeat this step with a sliver hollow prong ring and a female snap. <br><b/>5. Finally you can use force-bar to prevent the snaps loose, simply use a heavy tool to knock it.