Hipshot Bass X-tender Question

[Smadella]

Hey there bass-peeps.

I have a Warmoth Jazz 5 with Hipshot Ultralite tuners, and
I'm trying to buy the Hipshot Ultralite Drop-D.
There are a few options.
What/how do I choose from?
I'm a little confused by the options on the website:
HE6Y - 3/8'' Y Key Ultralite X-tender
HE6Y - 1/2'' Y Key Ultralite X-tender

I don't have any measuring tools for detailed/minute measurements.
And I don't quite know what the diameter of a standard Warmoth jazz 5 neck is.
Any help is appreciated.

Thanks,
Samson

 

[Pelagaard]

That's the tuner diameter, not the neck.  What size Hipshot tuners did you buy?  Buy the matching detuner.

 

[line6man]

Yeah, you just buy whatever matches what you have now. You should be able to tell what size you have, just by looking at the headstock.