Our veteran fretting experts here at StewMac developed this unique system to meet the need for speed and accuracy in production and repair work. You won't find a more thoughtfully designed and efficient arbor-based system! It's far more versatile than generic tool catalog arbors. It can fret an entire unglued fingerboard, a bolt-on neck, and most of an attached neck, quickly and consistently.
Why press frets? Faster and more consistent than hammering (and a lot quieter!), arbor-press fretting is preferred by many guitarmakers. Pressed-in frets have fewer loose ends and more uniform heights, because there's none of the recoil produced by hammer blows.