Berea Hardwoods Elegant and Elegant Beauty Sierra Button Click Pen
http://www.bereahardwoods.com/price/kits/pdf/Elegant Sierra.pdf
When doing step number one; press finial/button click assembly into one end of tube. Would use a homemade space block, omitted from instructions.
Drill a hole in a wooden block just large enough and deep enough to receive the clicker button. This will place the pressing force on the finial shoulder.
IF YOU PRESS ON THE CLICKER BUTTON, YOU WILL DESTROY THE CLICKER MECHANISM!
Might be worth an e-mail to vendor, for clarification.
Checkout these instructions
Berea Hardwoods Sierra Button Click Pen (Berea #7502)
1. Press the finial/button click assembly into one end of your finished blank. It
is important to use a block of wood, or other material, with a hole drilled to
allow the button on the click assembly to pass through. This will allow the
pressing force to be placed on the finial and NOT on the button. Pressing on
the button itself will damage the button click mechanism.