The invention relates to a Impact-type for anchoring in particular flared inwardly wells. The Impact-type consists of an internal bore and having a slit starting from its insertion end over part of its length expansible anchor (3), the seated by force on a bottom hole expansion body and provided with an expander cone (4) can be anchored. In order to prevent withdrawal of the expansion from the expansion body by a force acting on the expansible anchor tensile load, the expansion body is provided with a tubular engaging in the internal bore of the expansible anchor approach, the end after the puffing of the expansion anchor onto the expander cone of the expansion body in an expansion of the inner bore (13) of the expansion anchor is located, and by means of a wedge (9) is expandable.
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