All the reviews I've read are very complimentary to me except that I am really not satisfied. Indeed I have inflated the tires of a wheelchair, to screw the nozzle to the valve this is done without problem and inflation, but when he had to be removed by unscrewing the nozzle, the tire c 'deflated, inefficient pump in the end. I wonder if there is not an adapter to change the locking clip? if you have ideas I'm interested. I regret this purchase !!!