A tool (5, 5a) with an internal fluid passage, said tool comprising: a shank; a cutting blade mounted on said shank; and an internal fluid passage suitable for drawing in, together with air, chips produced when the cutting blade machines a workpiece; wherein said internal fluid passage made in said tool (5, 5a) comprises: a through hole made in said shank; at least one main inlet hole suitable for drawing in said chips together with said air, said main inlet hole being made in said cutting blade and being in fluid communication with said through hole, said main inlet hole extending from a main inlet hole entrance, located at the tip of the cutting blade, to a main inlet hole exit, located at the back of the cutting blade, and a plurality of sub-inlet holes (26, 26a) suitable for drawing in at least said air, said through hole having a larger cross-sectional area than said main inlet hole, said sub-inlet holes (26, 26a) having a sub-central axis which is inclined a predetermined angle (θ) to a main central axis of said through hole, wherein the air, which flows through said sub-inlet holes (26, 26a), flows obliquely to and joins said air flowing through said through hole, characterised in that said sub-inlet holes (26, 26a) are made in said shank and are in fluid communication with said through hole, wherein said sub-inlet holes (26; 26a) extend from respective openings in a tapered portion of said shank toward said through hole, and wherein the respective openings of said sub-inlet holes (26, 26a) are axially located between the main inlet hole entrance and the main inlet hole exit. a shank; a cutting blade mounted on said shank; and an internal fluid passage suitable for drawing in, together with air, chips produced when the cutting blade machines a workpiece; wherein said internal fluid passage made in said tool (5, 5a) comprises: a through hole made in said shank; at least one main inlet hole suitable for drawing in said chips together with said air, said main inlet hole being made in said cutting blade and being in fluid communication with said through hole, said main inlet hole extending from a main inlet hole entrance, located at the tip of the cutting blade, to a main inlet hole exit, located at the back of the cutting blade, and a plurality of sub-inlet holes (26, 26a) suitable for drawing in at least said air, a through hole made in said shank; at least one main inlet hole suitable for drawing in said chips together with said air, said main inlet hole being made in said cutting blade and being in fluid communication with said through hole, said main inlet hole extending from a main inlet hole entrance, located at the tip of the cutting blade, to a main inlet hole exit, located at the back of the cutting blade, and a plurality of sub-inlet holes (26, 26a) suitable for drawing in at least said air, said through hole having a larger cross-sectional area than said main inlet hole, said sub-inlet holes (26, 26a) having a sub-central axis which is inclined a predetermined angle (θ) to a main central axis of said through hole, wherein the air, which flows through said sub-inlet holes (26, 26a), flows obliquely to and joins said air flowing through said through hole, characterised in that said sub-inlet holes (26, 26a) are made in said shank and are in fluid communication with said through hole, wherein said sub-inlet holes (26; 26a) extend from respective openings in a tapered portion of said shank toward said through hole, and wherein the respective openings of said sub-inlet holes (26, 26a) are axially located between the main inlet hole entrance and the main inlet hole exit.