Improve your customers- sense of security during their daily travel by offering them this handy whistle.This whilstle is made of plastic and featured with a key ring and soft coil wristband which is easy wearing.Customize each one with company name,brand logo or marketing message and offer these whiltles to safety campaigns, sport supply shops, self-defense programs and so much more for best branded promotion. Measuring 2 1/8 inch x 3/4 inch, this custom whistle with coil wristband.