A drill guide (10) for a bone plate (16) which has holes (18) therethrough for receiving bone screws (120). The drill guide includes a guide block (14) having drill guide bores (22) alignable with at least two bone screw receiving holes in the bone plate. A first locking element (12) in inserted through a guide block drill guide bore. The locking element has a tip (38) for engaging a bone screw receiving holes in the bone plate, the tip being selectively expandable to engage and disengage from the bone plate hole. A second locking element (24) is mounted on the guide block and is engageable with a bone plate hole. The second locking element also has a tip (30) for resiliently engaging walls of the bone plate hole wherein the tip of the first and second locking elements has a split portion. The first and second locking elements include an axially moveable rod (36) for expanding the split tip portion to engage the plate.
