Cage bar spaceing for parakeets?

Hi, first off i have 2 keets, in a cage with .5" bar spaceing. i know lots bout keets,but im looking to get another to train(dont say its cruel to have one alone. im home all day to give it plenty of attention so dont even say it.) anyway, i have a ferret cage, i was thinking of converting into a parakeet cage. but the bars are almost 1 inch spaced,and i was wondering if that would be bad,or if the keet would get out? they are horasantal bars to climb, but i need an experst opinion. thanks