It's a screaming deal for sure. A few posts above the original post a member bought what looks to be a 3/8" set, which made more sense with the $20 after rebate price.
I double checked the link and it's definitely a 1/4" AND 3/8".

Last night I tell my girlfriend we should go hit up Menards for some of these Menards Days deals. I go and find the sign for these Gearwrenches and I grab what I think is the right box.
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This one. I think wow they also have an even bigger set but it's probably way more. Do the rest of the shopping, grab a Tractor Time with Tim shirt, get to the register. Pay. I look at the receipt as we're walking out and "Hey, there's no rebate on the receipt for the GW set??". We go up to the service desk and say this didn't ring up right. The woman looks through the sale ad and says "You bought the wrong one, you want the BIG one." Dumbfounded, I go back and sure enough the sign is for the huge set not the tiny one, even though the actual sign is not lined up with them. We do a quick swap, I get my 15$ credit back and we're on the way. The deal is definitely on the 3/8" + 1/4" set. If you buy the 3/8" only set, it's 15$ more BEFORE rebate.

