Insert and cutting tool

A cutting tool, comprising:

• a holder which has a first end, a second end and a length extending from the first end to the second end, and which comprises a pocket located on a side of the first end;
• and
• an insert being located in the pocket,
• the insert comprising:
• a base comprising
• a first surface having
• a first corner defined by two adjacent edges of the first surface, and
• a plurality of grooves,
• a second surface connecting to the first surface, and
• a cutting edge located on at least a part of a ridgeline of the first surface and the second surface, wherein
• the plurality of grooves is located at a position away from the ridgeline and at an angle θ1 of 20-90° relative to the ridgeline,
• each of the plurality of grooves has a first end part being an end part closest to the cutting edge and a second end part being an end part most away from the cutting edge, and extends from the first end part to the second end part,
• the plurality of grooves is arranged in parallel to each other and extends toward the first corner of the first surface,
• each of the plurality of grooves comprises
• an opening,
• a bottom surface, and
• a raised surface extended from the bottom surface toward the first end part, and
• an angle θ2 formed by the bottom surface and the raised surface is 95-135°.

An insert, comprising:

• a base comprising
• a first surface,
• a second surface connecting to the first surface, and
• a cutting edge located on at least a part of a ridgeline of the first surface and the second surface, wherein
• the first surface comprises a groove which is located at a position away from the ridgeline and at an angle θ1 of 20-90° relative to the ridgeline,
• the groove has a first end part being an end part closest to the cutting edge and a second end part being an end part most away from the cutting edge, and extends from the first end part to the second end part,
• the groove comprises
• an opening,
• a bottom surface, and
• a raised surface extended from the bottom surface toward the first end part, and the raised surface comprises
• a plurality of first regions, and
• a plurality of second regions,
• a second region of the plurality of second regions is interposed between adjacent first regions of the plurality of first regions,
• each of the plurality of second regions has an angle θ2 relative to the bottom surface larger than 135°, the angle θ2 being formed by the bottom surface and the raised surface, and
• each of the plurality of first regions has the angle θ2 relative to the bottom surface within the range of 95-135°.