There's very few jobs I hate more than plumbing. But being a homeowner - and the prices plumbers are charging - I've had to do as many jobs around the house as I can. So I've accumulated some old plumbing tools which seem to still work just fine. The brands are no longer around, but you can still find their stuff at estate sales and thrift stores.
Here's some from the Covers Company.
Chicago Specialties Manufacturing Company is another defunct brand.
Later on they started doing some other hand tools, like this 6-in-1 screwdriver and screw starter.
Found another old CSM tool yesterday. A 3003 lock ring spanner. About the last big tool of theirs that I was looking for.