Offer the highest advantage when used with Herdim System Pegs. Vastly used diameters of pegs 7.8 and 8.2 mm fit any either new or re-reamed holes, and the use of matching reamer and shaper makes the job easy even for non-professional and avoids mistakes and misperfections. The appropriate reamer ring adjusts the exact reaming depth, leaving the peg collar overlap 13 mm outside of the pegbox.