Abstract: A cable splice closure is provided including first and second casing parts, opposing edges of which may be brought together to close the closure, and a series of protrusions extending along the exterior of the first casing part adjacent to the edge of the first casing part. Also included are a series of openings extending adjacent the edge of the second casing part in an extending wall which, when the closure is closed, overlaps the exterior of the first casing part such that each protrusion is resiliently interlocked with a respective opening. The second casing part further includes a plurality of apertures in its extending wall for receiving a lever to force the casing parts together such that the respective protrusions and openings interlock and to force the casing parts apart such that the respective protrusions and openings disengage.