Pinball flipper spacing tool

This Flipper shaft end play spacing gauge helps you adjust your flipper bats on pinball machines. 

Every time you work on the flippers, you slide the prongs of the tool around the shaft of the flipper bat. It goes in between the nylon flipper bushing and metal flipper crank assembly. There should be just enough space so the spacing gauge can move free around, without excessive looseness or binding. Then you tighten the metal crank and remove the spacing tool.

This gives your flipper bats the ideal distance so they're not too tight and not too loose.

More info and pictures at https://www.flippers.be/basics/101_flipper_gauge.html