Get the other one, flex attachments have too much torque loss plus it acts like a spring when used with an impact driver, not fun when it's whacking your face.
https://www.amazon.ca/dp/B00C0VSNKQ/?tag=atomicindus04-20
Meh... I read the reviews on that, and even though I'm a Dewalt man, the Milwaukee hands down is better. Its all metal, and is impact rated. I've been abusing it with my Dewalt 130 ft lb 1/4. 20v driver, and never had an issue in 2 years. As you can see I got it back in late 2014.
When my dewalt 20v snaps torque bits like tooth picks, the Milwaukee right angle attachment keeps chugging along. At almost $60, its a lil spendy for occasional use. I use mine on everything from high speed drilling, to getting into tight bolts in the engine bay, and even use it on 14mm bolts torqued 50 ft lbs. You loosen the handle, and you can turn it 180*, or make it a left handed tool. I love mine, and Im tempted to buy a spare to squirrel away somewhere. Not very many tools on Amazon, get a 5 star rating from 250 people. [emoji12]
Edit, it does have a 1/4 hex collet collar. Simply lift up on the collar, and insert your favorite 1/4 hex bit.
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