Herdim Reamers are Made in Germany - 1/20 Taper (Irregular) Precision tools for shaping the peg, endbutton and endpin holes of stringed instruments. The reamer blades are made of High Speed Steel (HSS) hardened to 62 HRC to guarantee exceptionally long-lasting edges. Straight cutting edges - The triple straight cutting edges are particularly sharp and guarantee perfectly round holes. Hardwood handles.