Lowes offers Kreg Pocket-Hole Jig XL - Adjustable Size, Twist-Apart Dual Drill Guides for $29.98 (reg. $59.98) with free shipping. 

Product Description:
 Create pocket holes with twice the strength using the Kreg Pocket-Hole Jig XL. This extra-large jig makes it easy to build big and build strong using 2x4 or 4x4 boards, paired with the impressive holding power of XL Pocket-Hole Screws. The Pocket-Hole Jigs XL features hardened-steel drill guides that position the stepped XL drill bit at the perfect angle for extra-large pocket holes. The two drill guides position a pair of pocket holes at ideal spacing on the width of a 2x4 or 4x4 – but spacing can be adjusted by twisting the two drill guides apart easily to use them separately. The GripMaxx™ material on the underside of the jig helps it stay put while you drill. The jig includes a clamp pad adapter to secure your jig easily with Kreg clamps, as well as many other brands. Combined with the strength of XL Pocket-Hole Screws, which are specially engineered with extra holding power, the Pocket-Hole Jig XL is perfect for building big.