At 67 I checked the air pressure in many tires. I wish I had had this product 50 years ago. This makes it easy to control, increase or decrease air pressure. Instead of: bending over, checking the pressure with a tool, adding air with another tool. Change tool and check again. oops, too much added, backtrack some and check again (two more tool changes). Oops, let go of too much, back off a bit (two more tool changes) until you FINALLY get it right. Or do it instead: Bend once with FLOWPRO and all that without changing tools! It's worth it. buy you will like it.