In message , David
writes
I have a gap into which I want to insert a cut piece of wood.
[More detail available if necessary.]

The gap is around 345 mm but there is a slight recess so I can't eyeball a
tape with the exact measurement (although I haven't found that very
accurate when I'm doing it anyway).

I thought of a sliding measure which could be locked when it fitted the
internal dimensions.

I looked on line but they all seem to be 1 metre plus minimum length.

Does anyone know of such a measure or have a sneaky alternative method?

I was hoping to set a rigid measure, then transfer the measurement
directly to a piece of wood which I would then cut to fit exactly.

Two pointed bits of wood, longer than half your 345 (say 250 each).
Insert into hole gripping the overlap. Rotate to 90 deg. and adjust
until you are confident you have found the largest diameter. Remove from
hole and mark the overlap before relaxing your grip:-) Transfer the
length to your tape measure...


Cheers




Dave R

--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64


--
Tim Lamb