Tool main body and method for producing tool main body

A tool main body to which an insert is attachable,

• wherein the tool main body is made of a sintered metal material,
• wherein the sintered metal material includes:
• a parent phase made of a metal and
• a plurality of pores present in the parent phase,
• wherein the sintered metal material has a relative density of 93% or more and 99.5% or less,
• wherein, on an arbitrary cross section of the sintered metal material, an average perimeter of the pores is 100 μm or less, an average cross sectional area of the pores is 200 μm2 or more and 500 μm2 or less, and an average value of maximum diameters of the pores is 5 μm or more and 30 μm or less.