A spinal implant for placement between superior and inferior vertebral bodies, comprising: a housing; a bone engaging anchor for engaging an end of a superior vertebral body; a base plate (14, 114, 314, 514, 614, 1814) for engaging an end of an inferior vertebral body; at least one first extendable support element cooperating with and coupled to the bone engaging anchor, the first extendable support element having a contracted configuration within the housing to facilitate deployment of the implant between the superior and inferior vertebral bodies and at least one extended configuration to extend the bone engaging anchor away from the housing along a superior/inferior direction to engage the end of the superior vertebral body; and a locking system which has a first locking element that mechanically engages or interlocks with the first extendable support element to lock the implant between the superior and inferior vertebral bodies in an expanded configuration, characterized by: at least one member oriented laterally along a medial/lateral direction with respect to the bone engaging anchor and the base plate; at least a second extendable support element cooperating with and coupled to the member, the second extendable support element having a contracted configuration within the housing to facilitate deployment of the implant between the first and second vertebral bodies and at least one extended configuration to extend the member away from the housing along the medial/lateral direction; and at least a second locking element that mechanically engages or interlocks with the second extendible support element. a housing; a bone engaging anchor for engaging an end of a superior vertebral body; a base plate (14, 114, 314, 514, 614, 1814) for engaging an end of an inferior vertebral body; at least one first extendable support element cooperating with and coupled to the bone engaging anchor, the first extendable support element having a contracted configuration within the housing to facilitate deployment of the implant between the superior and inferior vertebral bodies and at least one extended configuration to extend the bone engaging anchor away from the housing along a superior/inferior direction to engage the end of the superior vertebral body; and a locking system which has a first locking element that mechanically engages or interlocks with the first extendable support element to lock the implant between the superior and inferior vertebral bodies in an expanded configuration, characterized by: at least one member oriented laterally along a medial/lateral direction with respect to the bone engaging anchor and the base plate; at least a second extendable support element cooperating with and coupled to the member, the second extendable support element having a contracted configuration within the housing to facilitate deployment of the implant between the first and second vertebral bodies and at least one extended configuration to extend the member away from the housing along the medial/lateral direction; and at least a second locking element that mechanically engages or interlocks with the second extendible support element. at least one member oriented laterally along a medial/lateral direction with respect to the bone engaging anchor and the base plate; at least a second extendable support element cooperating with and coupled to the member, the second extendable support element having a contracted configuration within the housing to facilitate deployment of the implant between the first and second vertebral bodies and at least one extended configuration to extend the member away from the housing along the medial/lateral direction; and at least a second locking element that mechanically engages or interlocks with the second extendible support element.