This is a great heat break, but the included cheap, stamped Chinesium wrench blows. You're going to round it out far before this thing even thinks about breaking loose after it's heat cycled with the aluminum block a couple dozen times.
The round end prevents most 7mm wrenches (especially good ones) from getting to the flats. Luckily, the perfect fit is as close as your nearest Lowes.
The Kobalt 7mm 12-Point Metric Standard Combination Wrench is thin enough to get you where you need to be. At about $5, it's barely more than the shipping for a replacement heat break after you *think* you can use Vice-Grips on it. (Pro-Tip: You can't, so don't.)
Couple this with a proper 20mm wrench (NEVER use adjustable wrenches on stuff like this) and you're removing it pretty easily.
Lowes Item #337657 Model #85632