Sizes: 1mm to 4mm. Nine inch average length. In 1835, David Strasmann (DASTRA) was founded in Wuppertal-Ronsdorf, Germany. The chisels are hardened to RC 60-61 and hold a razor sharp edge. Hornbeam handle. sizes and sweeps:

mm-sweep

1-17

1-19

4-13

5 -vee

1-12

4-2 1/2

5-3

4-4

2-22

3-19