I use these. They are not cheap, but I use them with one hand after starting, and you can feel (I can anyway) when to back off and break the chip. This is one of those items I don't recommend skimping on. The wrenches are cheap compared to the cost of the tap and the time trying to remove a broken tap. I'm sure there are cheaper places to buy them than Zoro.
Starrett Tap Wrench 91A | Zoro
Order Starrett Tap Wrench, 91A at Zoro.com. Huge in stock selection of Tap Wrenches with next day shipping on most orders.
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Starrett Tap Wrench 91B | Zoro
Order Starrett Tap Wrench, 91B at Zoro.com. Great prices & free shipping on orders over $50 when you sign in or sign up for an account.
www.zoro.com