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Quantity
1
Description
Replacement thumbstud for your EP1. This is the piece (attached to the piston) you use with your thumb to open and close the pen. You can screw and unscrew this piece with a t6 torx bit.
Reviews
4.7
18 ratings
5
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custom pen
J
Jake · February 7, 2026
Such a stud!
I lost a thumb stud and was slightly devastated when I couldn't find it. The EP1 is such a great pen that I, thankfully own two. Replacement stud + an extra arrived quickly and was installed with blue thread lock. I'm back in business and rocking copper on Ti.
