A non-reusable Intraosseous device comprising: a handle capable of being displaced by applying force, the handle comprising a spring-clutch and an inner barrel; a multi-splined axial shaft engaged with a multi-spiral nut and the multi-splined axial shaft is capable of being rotated, the multi-splined axial shaft comprising a needle hub comprising at least one needle; and when the handle is displaced axially down, it compresses the spring-clutch and engages with the inner barrel, thereby enabling the multi-spiral nut to move axially down, and rotating the multi-splined axial shaft, thereafter transferring the rotational motion and axial thrust to a trocar holder and the needle hub, and enabling access through an injection site by rotational piercing and / or rotational drilling action; CHARACTERIZED IN THAT the multi-splined axial shaft further comprises an axial hollow cavity and at least one opening; the non-reusable Intraosseous device further comprising: an automatic locking mechanism, configured to operate after enabling access through the injection site, comprising: at least one expandable element (9a1, 9a2, 9a3), the trocar holder comprising a trocar and a trocar holder shaft, wherein the trocar holder is inside the multi-splined shaft with the trocar holder shaft inside the axial hollow cavity and during an assembled condition the expandable element (9a1, 9a2, 9a3) is locked inside a hollow cavity of the trocar holder, wherein the expandable element (9a1, 9a2, 9a3) is configured to protrude outside the opening preventing axial updown motion of the multi-spiral nut along the multi-splined axial shaft rendering the non-reusable Intraosseous device non-reusable; and at least one spring or at least one spring eyelet (9b3) configured to press the expandable element (9a1, 9a2, 9a3) to protrude outside the opening preventing axial up-down motion of the multi-spiral nut along the multi-splined axial shaft rendering the non-reusable Intraosseous device non-reusable post insertion. a handle capable of being displaced by applying force, the handle comprising a spring-clutch and an inner barrel; a multi-splined axial shaft engaged with a multi-spiral nut and the multi-splined axial shaft is capable of being rotated, the multi-splined axial shaft comprising a needle hub comprising at least one needle; and when the handle is displaced axially down, it compresses the spring-clutch and engages with the inner barrel, thereby enabling the multi-spiral nut to move axially down, and rotating the multi-splined axial shaft, thereafter transferring the rotational motion and axial thrust to a trocar holder and the needle hub, and enabling access through an injection site by rotational piercing and / or rotational drilling action; CHARACTERIZED IN THAT the multi-splined axial shaft further comprises an axial hollow cavity and at least one opening; the non-reusable Intraosseous device further comprising: an automatic locking mechanism, configured to operate after enabling access through the injection site, comprising: at least one expandable element (9a1, 9a2, 9a3), the trocar holder comprising a trocar and a trocar holder shaft, wherein the trocar holder is inside the multi-splined shaft with the trocar holder shaft inside the axial hollow cavity and during an assembled condition the expandable element (9a1, 9a2, 9a3) is locked inside a hollow cavity of the trocar holder, wherein the expandable element (9a1, 9a2, 9a3) is configured to protrude outside the opening preventing axial updown motion of the multi-spiral nut along the multi-splined axial shaft rendering the non-reusable Intraosseous device non-reusable; and at least one spring or at least one spring eyelet (9b3) configured to press the expandable element (9a1, 9a2, 9a3) to protrude outside the opening preventing axial up-down motion of the multi-spiral nut along the multi-splined axial shaft rendering the non-reusable Intraosseous device non-reusable post insertion.