Kreg SK03 Pocket-Hole Screw Kit in 5-Sizes This kit contains 5 of our most popular self tapping screw sizes for pocket hole joinery. Use a 1" screw in 1 2" thick stock, a 1 1 4" screw in 3 4" stock and a 2 1 2" screw in 1 1 2" stock. Self tapping No. 2 square drive. Approximately 675 assorted scre. This kit contains five of our most popular self-tapping screw sizes for Pocket-Screw Joinery, in a durable easy-to-carry case. All Kreg screws feature a ...