What setup do I need to attach 2x material to 5/4 material?

[Angie Overton]

Most of the guides I've seen for determining the setup for your Kreg jig show equal material. I am building a kids picnic table and want to use my kreg to attach the 5/4 top boards to 2x4 material. When setting up my jig do I use the depth of the 5/4 board or the 2x4? And what size screw would I use? I don't want the tips poking out of my top. 

[KregRep]

When it comes to joining materials of different thicknesses, it’s a good idea to test screw length. Do this by drilling in to a test piece(s). The typical rule is as follows: Set your Kreg Jig® for the thickness of material you are drilling the pocket hole in. Then, choose screw size based on thickness of the mating piece the screw will be entering in to. The Screw Selector Wheel will help you identify the correct screw length and jig setting.

[KregRep]

If you have any further questions, feel free to contact Technical Support at 800-447-8638 or [e-mail]. They are very knowledgeable and will be more than happy to offer you their best advice. Thanks! 

[Angie Overton]

This is exactly what I was wondering. Set the jig to material i'm drilling hole in.... and choose screw based on the mate. Thank you!

KregRep said:

When it comes to joining materials of different thicknesses, it’s a good idea to test screw length. Do this by drilling in to a test piece(s). The typical rule is as follows: Set your Kreg Jig® for the thickness of material you are drilling the pocket hole in. Then, choose screw size based on thickness of the mating piece the screw will be entering in to. The Screw Selector Wheel will help you identify the correct screw length and jig setting.