Micro jig compared to the regular size

[Jack Haskins, Jr.]

I got the K4 master system so I have the different parts that come with it.  I was looking at the plans for a jig station and it said they use 1/2" boards and the MICRO JIG. But the regular K4 will work with 1/2" boards also. So why use the micro size? When I first saw it I assumed it would be used for projects where the thickness is under 1/2" but that doesn't seem to be the case. The main difference seems to the the hole diameter being smaller by 25%. Why would I decide to use (or even buy) the micro jig if I can't use thinner boards?

If I wanted to build a bird house using 1/2" plywood which I think is 3/8" thick can I do it with the micro jig?

I am not a skilled woodworker so the answers to some of my questions are probably obvious to a lot of you guys and gals.  In general, when would you use a micro size instead of the standard size?  Help from you guys is greatly appreciated.

Jack

[KregRep]

Hi Jack,
The Kreg Jig® K4 is designed to work with material that is 1/2" to 1-1/2" thick. The
Micro-Pocket™ Drill Guide is designed to work with 1/2" stock and narrow stock down to 1"-wide. Both jigs are compatible with 1/2" stock. If you need any further advice, feel free to reach out to Kreg Technical Support by calling 800-447-8638 or by emailing [e-mail]. They are very knowledgeable and will be more than happy to assist you.
Thanks, and have a great day!
KregRep

[wm frank straub]

The reg jig will work fine, the Micro will give you a neater, more finished look.  Kreg offers smaller screws also, sized for the Micro.

1/2" plywood measures 31/64", not 3/8,  all plywood is slightly under nominal size, but not that much.

[carol]

I made a little doggie trough for our pup using the micro on 1/2" plywood. What was really nice was that the holes are so much smaller, and you can use smaller screws. 

I've used my standard jig on the same 1/2" stock but it gets a little messy. Drill some test holes in the smaller stock, you'll see what i mean :)