Insert and cutting tool

A cutting tool, comprising:

• a holder which has a length extending from a first end to a second end, and which comprises a pocket located on a side of the first end;
• and
• an insert, the insert being located in the pocket,
• wherein
• the insert includes a base, the 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,
• the first surface comprises a plurality of grooves which is located at a position away from the ridgeline and at an angle 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,
• each of the plurality of grooves comprises an opening, a bottom surface facing toward the opening, and a raised surface directly connected to the bottom surface and the first end part, wherein the raised surface is gradually inclined from the bottom surface to the first end part, and in a direction from the first end part to the second end part, a length of the bottom surface is larger than a length of the raised surface,
• the plurality of grooves is away from the ridgeline in a range of 40-700 μm, and
• a width W of each of the plurality of grooves is 50-700 μm, a depth D of each of the plurality of grooves is 20-700 μm, and spacing S between grooves adjacent to each other is 50-700 μm.