Expand the capability of Kreg Pocket-Hole Jig 310 or 320 by adding another drill guide to drill more holes, plus a spacer that fits between the guides for more hole-spacing options. The Pocket-Hole Jig Expansion Pack includes one hardened-steel drill guide with thickness stops for 1/2 In., 3/4 In., 1-1/2 In., so you can add a second guide to your Pocket-Hole Jig 310, or add a third to the Pocket-Hole Jig 320. This kit also includes a Pocket-Hole Jig Spacer that provides more pocket-hole spacing options by simply positioning the spacer, and then twisting the drill guides to lock them in.