1. The cutting insert for the milling cutter (10), including a pair of opposing end surfaces (12), a pair of opposing auxiliary surfaces (14) and a pair of opposing main surfaces (16), each end and main surfaces intersect along the main edge (20), at least measure, part of which forms the main cutting edge (30), each end and auxiliary surfaces (12, 14) intersect along the auxiliary edge (32), at least part of which forms the auxiliary cutting edge (36), each main cutting edge (30 ) and adjacent the auxiliary cutting edge (36) is connected through the angular cutting edge (46), each auxiliary surface (14) has two samples (38), each sample (38) has a bottom (40) and goes to the adjacent end surface (12), each the bottom (40) of the sample and the adjacent end surface (12) intersect along the edge (42) of the sample, at least part of which forms a rear cutting edge (44), located transversely and connected to the adjacent auxiliary cutting edge (36) .2. A cutting insert (10) according to claim 1, in which each end surface (12) has 180 ° rotational symmetry about the first axis (A) passing through two end surfaces (12). 3. A cutting insert (10) according to claim 1, in which each auxiliary surface (14) has 180 ° rotational symmetry about the second axis (B) passing through two auxiliary surfaces (14) and located perpendicular to the first axis (A). 4. The cutting insert (10) according to claim 1, in which each main surface (16) has 180 ° rotational symmetry about the third axis (C) passing through the two main surfaces (16) and the perp
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