I bought the tool secondhand somewhere in #Edmonton, #Alberta sometime shortly after the beginning of the #covid19 #pandemic, as one of many quasi-random #tools and #materials I would end up testing and using to create my own masks that would be safe for me to wear for long periods and provide the best degree of homemade #PPE protection I could manage whilst also avoiding problems with #allergies (such as metal on nose-fittings). 3/x #TrialAndError #testing #experimental #experimentation #safety #health #CovidIsNotOver