A method of securing a bone graft to an anterior surface of a patient's glenoid bone, including drilling first and second bores through a posterior surface to an anterior surface of the glenoid bone; measuring a medial distance of the first bore; transferring the medial distance to a bone block; drilling a third bore based on the medial distance through the bone block to match the first bore; positioning the bone block in contacting relation with the anterior surface of the glenoid bone, and coaxially lining up the third bore with the first bore; positioning a first fastener through the third bore and the first bore; drilling a fourth bore in the bone block by positioning a drill bit through the second bore from the posterior side of the glenoid bone, and extending the drill bit from the first surface of the bone block to the second surface of the bone block; and positioning a second fastener through the fourth bore and the second bore.