1. A spinal implant comprising: an outer corpus including a first surface and a second surface; an inner corpus including a third surface and a fourth surface, the inner corpus axially displaceably coupled to the outer corpus, the third surface of the inner corpus surrounded by the second surface of the outer corpus; a first lever accommodation provided on the outer corpus, the first lever accommodation comprising an elongated aperture that includes: a first longitudinal side having a first set of teeth protruding into the first lever accommodation, the first set of teeth formed between the first surface and the second surface, wherein the first set of teeth extend from the first surface to the second surface; and a substantially smooth second longitudinal side; a second lever accommodation provided on the inner corpus, the second lever accommodation comprising an elongated aperture that includes: a first longitudinal side; and a second longitudinal side having a second set of teeth protruding into the second lever accommodation, the second set of teeth formed between the third surface and the fourth surface, wherein the first lever accommodation and the second lever accommodation are aligned so that the first longitudinal side of the first lever accommodation is opposite the second longitudinal side of the second lever accommodation; a first guide provided on the inner corpus; and a second guide provided on the outer corpus, the first guide and the second guide to allow for axial displacement of the inner corpus relative to the outer corpus and to prevent rotation of the inner corpus relative to the outer corpus.