RC Crawler Strong Winch Hook

RC Crawler Winch (etc) hook, designed to take a 10mm long M3 bolt (the ones we all have knocking around in the spares box) and will clip onto 5mm bar, such as that used to make bumpers.
I felt bad placing an order for a tiny hook to be shipped from China, so decided to make one instead. It turned out well and is easily strong enough to pull my ~5kg pickup around, so I thought I'd make it available to you.
It takes about 16 minutes to print on my Flashforge Finder, comes out nice and neat and there's minimal post-print palaver.