They stop making most 1/4” drive sets at 13 mm / 1/2” for a reason.
Sizes above that in 1/4” drive are convenient for access but are also pushing its capability, especially under repeated or dynamic loads that might come from loosening rusty full-torque fasteners, and are ideally reserved for lower torque or access-critical situations. (Advertised proof torques are one-time tests.)
Unless you want to risk breaking the drive square at some point, you should use 3/8”. That said, the flex you are feeling is probably mostly elastic wind-up in the extension, which is to be expected for the thinner shaft.
If you can crack it loose without drama, 1/4” offers speed, low back drag, knuckle/extension clearance. Some manufacturers who stand behind their quality offer long ratchet handles that address a little of your concern.Why would anyone want to use 1/4 ratchet on larger sockets? At 14mm, I would prefer to use 1/2 drive ratchet already. Make life easier for yourself.
Why would anyone want to use 1/4 ratchet on larger sockets? At 14mm, I would prefer to use 1/2 drive ratchet already. Make life easier for yourself.
I was talking about 14mm oil drain plugs. If inside engine bay, probably 1/2 too big. I still would hesitate to put too much force thou. A decent 1/4 fails around 70-80 ft lbs. But before it fails, some internal damage could happen. I just prefer not to torture my tools, no matter whether I can get warranty replacement or not.Because a massive 1/2 drive ratchet with a 14mm socket the size of my thumb doesn't fit behind the intake manifold.
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I was talking about 14mm oil drain plugs. If inside engine bay, probably 1/2 too big. I still would hesitate to put too much force thou. A decent 1/4 fails around 70-80 ft lbs. But before it fails, some internal damage could happen. I just prefer not to torture my tools, no matter whether I can get warranty replacement or not.
It’s true regular 1/2 sockets and ratchets might not fit some drain plugs. But I got stubby 1/2 sockets, and pass thru 1/2 set. So I can take care of anything with reasonable clearance with 1/2. Anything inside cabin or around dash is typically 1/4. Others are 3/8Even a drain plug can be a tight fit, I can think of several designs from Honda, GM, Audi, where 1/2 drive would not fit.
A drain plug is very rarely supposed to be above 30ft/lb, so a long handle 3/8 is my choice.
I'm going to assume that anything larger than 16mm is using an adapter of some sort if you're using a 1/4 drive tool (ratchet or impact) as I've never seen anything larger than a 16mm 1/4" drive socket (though they may exist).Up to 15mm by hand and 19mm on a 1/4” impact
Gedore makes a 17mm.I'm going to assume that anything larger than 16mm is using an adapter of some sort if you're using a 1/4 drive tool (ratchet or impact) as I've never seen anything larger than a 16mm 1/4" drive socket (though they may exist).

How does "3/8" in a 1/4" body" ratchets change the calculus? I feel like the heads on these ratchets make them much more maneuverable.
I'll grab a 1/4 driver when I'm concerned about over-tightening something, actual socket size on the end could be anything.
Sometimes I'll even use 1/4 driver when it's appropriate...![]()
Yeah, a 1/4” hex to 3/8” square adapterI'm going to assume that anything larger than 16mm is using an adapter of some sort if you're using a 1/4 drive tool (ratchet or impact) as I've never seen anything larger than a 16mm 1/4" drive socket (though they may exist).