This portable jig kit can be used on its own for drilling single pocket holes or in combination with other components of Kreg’s modular, expandable 300-series jig system. The kit includes a drill guide made of rigid glass-reinforced nylon with a hardened steel bushing, a non-slip base, and graduated positioning stops for quick, reliable set-up on 1/2", 3/4" and 1 1/2" material.