Kreg KPHA308 Easy-Set Drill Stop Set, Polypropylene/SteelThe Kreg Easy Set Pocket Hole Drill Bit with Step Collar and Gauge Wrench is the same stepped bit that comes with 300 Series Kreg Pocket Hole Jigs. Highlights: Material: Polypropylene Steel Style: Easy Set Stepped drill bit, stop collar and material thickness gauge wrench for Kreg Pocket Hole Jigs Drill bit features easy set etched markings for 1 2 inch, 3 4 inch, 1 1 2 inch materials Stop collar window aligns with etched markings on drill bit for