In addition to the absence of PFA left and right eccentricity function, PFB also has an additional central through-hole for extending the long shot tip for clamping and processing.

Due to the abandonment of the left and right eccentricity function in the design of the through hole, the optional accessory PFB1 is specially designed to achieve the function of adjusting the angle of the grinding wheel.

There is also an optional SVB that can be clamped to a minimum diameter of 0.5mm for processing.

The standard bow handle and PFB1 do not include diamond pens and require additional options