10Pack 3/4" (19mm) Survival Whistle Buckle for Paracord Bracelet Key Lanyard Ourdoor Hiking Camping Backpack Bag Pets Collar DIY Travel Kits 1) Size:62mm*32mm*11mm , Webbing Size:3/4"(19mm) 2) Product Sytle:Fire Starter Survival Whistle Buckle , Material :Plastic/Magnesium/Metal 3) Fire Starter Buckles With Whistle tested and approved to be the most durable, Flint on side with REMOVABLE striker/scraper on the other 4) Very Loud whistle buckle to alert others you need help, No plans to lost. These survival tools are on your wrist all the time 5) Used for making dog collars, lanyards. and other survival gear that you can carry every day so you have it when you need it.