A cutting tool comprising a tool body having a body central bore, a center pin seated within the body central bore; wherein: the tool body comprises: a body front face; a body rear face, opposite the body front face; a body peripheral face, extending rearwardly from the body front face; and at least one flute formed on the body peripheral face and extending rearwardly from the body front face, the at least one flute comprising a first row of insert pockets adjacent the body front face and at least a second row of insert pockets axially rearwardly displaced with respect to the first row, wherein each of the insert pockets is associated with a cooling hole that is in fluid communication with the body central bore; and a cutting insert retained within each of the insert pockets, the cutting inserts retained in the first row of insert pockets forming a first row of cutting inserts, and the cutting inserts retained in the second row of insert pockets forming a second row of cutting inserts; characterized in that a relocatable seal is seated on the center pin; wherein when the relocatable seal is seated at a first sealing position along the center pin, the body central bore is in fluid communication with a first number of rows of cutting inserts; and when the relocatable seal is seated at a second sealing position along the center pin, the body central bore is in fluid communication with a second number of rows of cutting inserts that is different from the first number of rows of cutting inserts. the tool body comprises: a body front face; a body rear face, opposite the body front face; a body peripheral face, extending rearwardly from the body front face; and at least one flute formed on the body peripheral face and extending rearwardly from the body front face, the at least one flute comprising a first row of insert pockets adjacent the body front face and at least a second row of insert pockets axially rearwardly displaced with respect to the first row, wherein each of the insert pockets is associated with a cooling hole that is in fluid communication with the body central bore; and a cutting insert retained within each of the insert pockets, the cutting inserts retained in the first row of insert pockets forming a first row of cutting inserts, and the cutting inserts retained in the second row of insert pockets forming a second row of cutting inserts; a body front face; a body rear face, opposite the body front face; a body peripheral face, extending rearwardly from the body front face; and at least one flute formed on the body peripheral face and extending rearwardly from the body front face, the at least one flute comprising a first row of insert pockets adjacent the body front face and at least a second row of insert pockets axially rearwardly displaced with respect to the first row, wherein each of the insert pockets is associated with a cooling hole that is in fluid communication with the body central bore; and a cutting insert retained within each of the insert pockets, the cutting inserts retained in the first row of insert pockets forming a first row of cutting inserts, and the cutting inserts retained in the second row of insert pockets forming a second row of cutting inserts; characterized in that a relocatable seal is seated on the center pin; wherein when the relocatable seal is seated at a first sealing position along the center pin, the body central bore is in fluid communication with a first number of rows of cutting inserts; and when the relocatable seal is seated at a second sealing position along the center pin, the body central bore is in fluid communication with a second number of rows of cutting inserts that is different from the first number of rows of cutting inserts.