Think of working on nuts and bolts. One might have two or more sizes to
get a couch out of a wood crate or any thing you might come up with.

Consider the 'two drill chuck' drill - drill and screw or drill and
countersink....

Same sort of thing.

Martin

On 1/22/2017 1:41 PM, Jeff Wisnia wrote:

Until recently I'd never known that double ended adjustable wrenches
existed and are now collectors items.

I suppose there are jobs where being able to tighten or loosen two
different size bolt heads or nuts to get the job over with exist. and a
double ended adjustable wrench made your tool bag lighter than carrying
two separate wrenches.

(Don't bother telling me that one end is for English and the other for
metric, I've heard that one already.)

See a double ended adjustable wrench made by Crescent Tool Company he

http://alloy-artifacts.org/crescent-...l#early-adjust


That site http://alloy-artifacts.org/ has a lot of interesting tools on it.

Jeff