| 摘要 |
The invention relates to a chisel (1) or a hammer drill, in particular insertable chisel or insertable drill for power-driven drill and chisel hammers, with an insertion end (2), with a chisel shank (3) or drill shank and with a chisel head (4) or drill shank located opposite the insertion end (2). In this case, the diameter of the shank (3) increases in the direction of the chisel head (4) at least once from a first, small diameter to a second, large diameter and decreases again from this to a small diameter or forms at least one bead (8).
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