They are identical and can be used with confidence. We have sold thousands! Sold individually. 

Length: 0.0000 in
Width: 0.0000 in
Height: 0.0000 in
Weight: 0.200 oz
Packaging: 0.0000 kg
Units in box: 1
Parts by Make/Model > Fender Parts > System 1 - Japan
Parts by Type > Fine Tuning Knobs