jig adjustments

[michael juszczak]

how do  you adjust jig for 3/8 plywood there is no marks on it 

[michael evans]

Hi Michael , i do not own the Kreg jig but in the spirit of helping a fellow wood worker , always and i stress always do several test holes on a scrap then adjust as necessary .  To many people put to much trust in tool manufactures reference lines to find their off . Tried and tested is the way to go happy woodworking. Mick !! 

[Tim Grace]

I believe the K3, 4 & 5 are designed for 1/2" and thicker materials.  If I am not mistaken, the drill bit diameter for those jigs is 3/8".  For 3/8" material, look at the Kreg Micro Jig.  The Micro Jig has a smaller drill diameter.  I'll use my Micro Jig for 1/2" material or thinner.

[KregRep]

Hi Michael. Not sure what jig you're working with, but like Tim said, the K3, K4, and K5 models are designed to work with materials from 1/2" to 1 1/2" thick. The Micro Drill Guide is designed for thinner stock, and narrow stock, down to 1" wide. If you have any further questions, please don't hesitate to get in touch with Technical Support at 800-447-8638 or [e-mail]. Thanks!