KREG Expansion Pack 300-SeriesExpand the capability of your 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 13 mm, 19 mm, and 38 mm, 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