Kreg, Pocket Hole Jig 310, Features A Hardened Steel Drill Guide & Thickness Stops For 1/2", 3/4", 1-1/2", Material Gives The Versatility Needed To Build With Boards & Plywood Found In Home Centers, Material Thickness Gauge & Easy Set Drill Bit Make Setup Simple, Anti Slip Base Holds The Jig Precisely In Position, Durable Construction & A Lifetime Drill Guide Warranty.