Quoted from j_m_:chris, what's the purpose of this nail inside of the rubber ring arrangement behind the switch on the joker poker?
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The nails in older games do a few things:
It keeps the ball from getting trapped if the wrong size rubber is installed, while still allowing full switch blade travel (for self cleaning action).
On really large plastics, the installed nails are taller and keep the plastics from sagging from the bulb heat.
Stainless Steel finishing nails polish up as nice replacements.
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