Knob Bushing Puller router guide it follows your guitar body

it follows your guitar body when you cutting the channels

the groove can keep the caul centered on the fret

one pin Sperzel tuners

lighter and more accurate！Flat accuracy +/-

Knob Bushing Puller router guide it follows your guitar bodyThis Knob Bushing Puller is for removing guitar knobs and bushings without damaging, it has a rubber bottom to protect your guitar finish when you do pulling, the steel square unit inside the housing has 2 ends, one end for pulling knob and the other for pulling bushings, with the provided screws and washers you can easily pull different guitar bushings. Below are the screw sizes that are included for pulling bushings: 5 16 18 5 16 24 10 32 M5 M6 M8