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Let me add a little here. At work sometimes we have something so tight that my impact won't break it loose. Its a very powerful 1/2 drive IR unit. We use mostly 1/4 air hoses but also have some 3/8 hoses laying around (its an airline maintenance hangar, very large facility) When it cannot do the job using a 1/4 hose, the first thing I do is look for a 3/8 hose. Even though the couplings and QD nipples are the same size inside, the larger hose allows a better flow of air over the very long runs we usually have to use. When the 3/8 hose doesn't work, or I cannot find one. I reach in my toolbox and grab my air hose doubler. Its one standard coupling that plugs on the impact with what is esentially a T fitting with coupling nipples on it. I plug two air hoses to the T and plug it to the impact. Sure, I'm still jamming all of that air thru that tiny hole in the QD nipple on the impact, but guess what, it usually does the trick. On 3/4 drive impacts the tool room has, this air hose doubler is almost a necessity. (our 1" drive impacts us a huge QD coupling and a 3/4 air hose, we have lots of those laying around also. That will get nearly anything loose!!!!! ) While I like 1/4 hoses, they are small and easy to handle, they don't always work, and when they don't, you need a bigger hose even more so than a bigger QD coupling. Charles
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