Fender 4 String American Professional Precison Bass - Gold Pearl Black/White/Black Lamination kent-armstrong-icon-series-guitar-pickups Diameter at base of knob

Diameter at base of knob (outside edge of skirt): 19

Kluson tuners (1995 - 2006 production) or any tuners requiring a vintage peg hole size 11/32 in

We have an additional option of chrome with extra long posts and these use 21

This exclusive tungsten sustain blocks for Floyd Rose tremolo bridges offers the highest density available in a tremolo block that conforms to the original size specifications of your Floyd Rose bridge

Fender 4 String American Professional Precison Bass - Gold Pearl Black/White/Black Lamination kent-armstrong-icon-series-guitar-pickups Diameter at base of knobThis pickguard is made to fit the Fender 4 String American Professional Precision Bass