The Kreg Pocket-Hole Jig K4 combines precision and adjustability of a proven, time-tested pocket-hole jig trusted by DIYers and pros. The three-hole drill guide lets you make perfectly placed pocket holes in a wide variety of material widths and thicknesses — from 12mm to 38mm increments. Plus, the hardened-steel drill guides come with a lifetime warranty. An included dust collection adapter connects to your shop vac to keep your workspace dust-free. The K4’s rear-mounted clamp was introduced with the first Kreg Pocket-Hole Jig, and the design offers incredible rigidity and uncompromising workpiece holding strength. Adjustments are as easy as releasing the locknut and rotating the clamp pad to the correct setting. The K4 is made from impact-resistant polymer for strength and durability that Kreg customers expect. A wood-chip relief hole for each drill guide keeps the drill bit clear of excess debris, minimizing drill-torque, increasing the longevity of drill bits, and allowing you to complete a perfect pocket hole in just one plunge. A large clamping recess makes securing your jig to your workbench easy using Kreg multipurpose face clamps or any common bar clamp or C-clamp. Alternatively, the K4 can be screwed into a workbench or other surface.