The Kreg(TM) Pocket-Hole Jig 310 makes it easy to build DIY wood projects. The 310 features a hardened-steel drill guide and thickness stops for 1/2", 3/4", and 1 1/2" material, along with a material-thickness gauge and easy-set drill bit that make setup simple. Durable construction and a lifetime drill-guide warranty ensure the Kreg Pocket-Hole Jig 320 will deliver years of performance and value you expect from the #1 pocket-hole brand—Kreg.