Review on CO2 Bike Tire Inflator Pump with Insulated Sleeve - Quick & Easy Use for Road and Mountain Bicycles - Fits Presta and Schrader Valves - Cartridges Not Included by Marvin Perry

Unfortunately I had to downgrade this product as after less than 10 uses the product is now venting almost all of the gas out of the valve handle instead of into the stem valve which causes inflation the hose becomes unsafe or impossible. When functioning properly, the user can rest assured that after screwing the threaded CO2 cartridge into the inflator, you can simply securely thread the inflator onto the threaded valve stem and then gently turn the valve knob counter-clockwise to reinflate the hose. . A control valve is a good idea, but the quality of construction raises some questions.