Designed with the same tried-and-true efficient design and hardened-steel drill guides as the original Kreg® Jig®, the Kreg® Jig® HD lets you create joints in 1-1/2 in 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® Jig® HD excels - strength. It utilizes #14 heavy-duty, hardened-steel screws that provide incredible shear resistance, as well as three anti-corrosion layers for incredible long-term moisture resistance.