Designed with the same tried-and-true efficient design and hardened-steel drill guides as the original Kreg Pocket-Hole Jig, the Pocket-Hole Jig HD lets you create joints in 1 1/2" and thicker materials that are an amazing 50% stronger than traditional Kreg Joints™. If you are framing walls, building deck railings, outdoor furniture, or any other large project, you always want the strongest joint possible; and this is where the Kreg Pocket-Hole Jig HD excels — strength.