Tool Tip: Choose the Correct Kreg Screw Kreg Jig® Setting | Lately, we've had quite a few people asking how to go about choosing the right Kreg screw and Kreg Jig setting. The chart below shows which screw and setting you should choose based on your material thickness. By choosing the correct Kreg screw and Kreg Jig setting, you will drill perfect pocket holes every time, ensuring project success.