• aluminum alloy
• Safety whistle with key ring-- you can use it with keychain, it is easy and convenient to take it anywhere you want.
• Outdoor survival whistle-- ?emergency survival. it can be used to call for help if there is an accident.
• Survival gears-- whistle keychian, apply to outdoor survival, self- protection, life- saving and collect, providing help for you.
• Gadgets for men-- its the for adventurous, outdoor who will be very happy.
• Whistle key chain-- lightweight but loud enough. the sound can be heard from far distance.