Review on Capri Tools 21072 5-in Air Blow Gun with Rubber Tip, Blue: The Perfect Tool for Quick and Precise Cleaning! by Adrian Woodside

I bought 5 of these for my home shop/clean room about a year ago. In the last two days, 3 out of 5 have torn spontaneously and started to leak profusely. Inside is a 1/4" NPT metal threaded socket that the hose threads into. Even if they were overtightened (which they aren't), it shouldn't cause this crack. There appear to be residual stresses due to injection molding of cheap materials. The second complaint is that it's almost impossible to adjust the airflow like I've done on previous blowguns, it's basically an on/off switch.