An assembly for implant installation between adjacent vertebral bodies of a patient, comprising: - an implant having a support body and a rotatable insert therein; - the support body having a curved shape extending laterally from a proximal end portion to a distal end portion and configured and dimensioned for installation between adjacent vertebral bodies transforaminally, the distal end portion having a tapered end narrowing towards a distal most end; - wherein the support body defines a first longitudinal opening extending longitudinally therethrough and wherein a plurality of protrusions are provided on the support body along superior and inferior end surfaces to facilitate prevention of expulsion of the implant once installed; - wherein the support body defines a second longitudinal opening adjacent the proximal end to accommodate the rotatable insert therein and - wherein the insert is cylindrical and is rotatable about a central longitudinal axis within the second longitudinal opening to permit the support body to rotate about the insert and the central longitudinal axis; - the insert being provided with a circumferential rib arranged for mating a corresponding indentation formed in the support body for longitudinally constrain the insert with respect to the support body; and - an installation instrument removably attached to the proximal end portion of the support body and engageable with the rotatable insert to selectively permit rotation between the insert and the support body, - the installation instrument extending along a longitudinal tool axis, wherein the installation instrument is movable between a first position in which an implant stabilizer of the installation instrument is engaged on the implant so that the insert is rotationally fixed with respect to the support body and a second position in which the implant stabilizer is disengaged form the implant and the support body may rotate with respect to the insert; - wherein the proximal end portion has a rounded shape and includes a pair of grooves (40, 46) on lateral sides of the implant to engage the installation instrument and wherein a groove (40, 46) is in communication with the second longitudinal opening to allow a part of the installation instrument to engage the threaded hole. - an implant having a support body and a rotatable insert therein; - the support body having a curved shape extending laterally from a proximal end portion to a distal end portion and configured and dimensioned for installation between adjacent vertebral bodies transforaminally, the distal end portion having a tapered end narrowing towards a distal most end; - wherein the support body defines a first longitudinal opening extending longitudinally therethrough and wherein a plurality of protrusions are provided on the support body along superior and inferior end surfaces to facilitate prevention of expulsion of the implant once installed; - wherein the support body defines a second longitudinal opening adjacent the proximal end to accommodate the rotatable insert therein and - wherein the insert is cylindrical and is rotatable about a central longitudinal axis within the second longitudinal opening to permit the support body to rotate about the insert and the central longitudinal axis; - the insert being provided with a circumferential rib arranged for mating a corresponding indentation formed in the support body for longitudinally constrain the insert with respect to the support body; and - an installation instrument removably attached to the proximal end portion of the support body and engageable with the rotatable insert to selectively permit rotation between the insert and the support body, - the installation instrument extending along a longitudinal tool axis, wherein the installation instrument is movable between a first position in which an implant stabilizer of the installation instrument is engaged on the implant so that the insert is rotationally fixed with respect to the support body and a second position in which the implant stabilizer is disengaged form the implant and the support body may rotate with respect to the insert; - wherein the proximal end portion has a rounded shape and includes a pair of grooves (40, 46) on lateral sides of the implant to engage the installation instrument and wherein a groove (40, 46) is in communication with the second longitudinal opening to allow a part of the installation instrument to engage the threaded hole.