Abstract: An improved continuous casting mold and means for securing the mold liners wherein vertical cooling water passages which in cross-section present a dovetail configuration are machined in the back side of the mold liner plates. The cooling water passages are all of substantially equal dimensions and are equally spaced along the length of the mold liner plates. Corrosive resistant bars having beveled edges to match the dovetail passages are inserted into the water passages. Tapped holes in the bars receive hold down bolts which pass through the bars between the formed water passages and thus do not interfere with uniform heat transfer.