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Kreg Jig K4MS Master System

The K4 Master System wraps all the versatility and ease-of-use of pocket hole joinery into one simple, intuitive jig.
Item #
94% of 100
With a sturdy toggle clamp to secure your stock to the jig, and a large frontal clamping recess for securing the jig to the bench, you'll get perfect alignment every time. Thanks to the removable drill guide and portable base, you have the option of taking the jig to large work pieces and awkward locations or slipping it in your pocket for work on the job site. The material support stop guarantees perfect repeatability time after time, and the dust collection shroud aids in chip expulsion for faster, cleaner drilling. Adjustable for 1/2" to 1-1/2" thick stock in 1/8" incremental settings.


  • 3 tools in 1 - benchtop jig, portable contractor jig, repair jig with addition of spacer blocks to the bottom of drill guide
  • 3-hole drill guide w/hardened steel core-adjustable for 1/2" to 1-1/2" stock thicknesses in 1/8" increments
  • Material support stop swings out of the way for multiple holes
  • Glass reinforced nylon body
  • Wood chip relief-one relief hole for each drill guide hole keeps chips clear for faster drilling and less burning
  • Large clamping recess
  • Sturdy toggle clamp - easily adjusted
(1) Kreg Jig K4 Pocket Hole Joinery System
(1) Face Clamp
(1) Portable Base
(1) Drill Guide Spacer
(1) Material Support Stop
(1) Dust Collection Attachment
(1) 3/8" Stepped Drill Bit
(1) 6" Square Driver
(1) Starter Screw Set
(1) Starter Plug Set
(1) Detailed Instruction Manual
More Information
Brand Kreg
Manufacturer Part Number K4MS
Weight 5.8000
Type Concealed
4.7 / 5.0
84 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great cabinet
I love it. I already made a great plywood cabinet for my garage. I only used Kreg pocket holes.
June 24, 2020
1 month ago
Woodworking Experience:
Never knew how easy assembly could be.
For many hears I have carefully milled joints on everything I built, even those utilitarian projects, unpainted, that I use daily. This little gizmo has sped up my production and allowed me to make precise joints that are both strong and accurate. Yes, definitely recommend.
June 7, 2020
1 year ago
Woodworking Experience:
It's really well put together. Simple & really well thought out.
May 31, 2020
2 months ago
Is as easy to use as described...
March 4, 2020
4 months ago
Woodworking Experience:
Great jig, nice to work with.
December 2, 2019
8 months ago
I'm new to woodworking and my daughter wants a bookcase made. I bought this hoping it does what it's hyped to do. My first project was a charging station for my drills and batteries. It worked as advertised. I recommend purchasing a least one right angle clamp to keep the wood from "walking" as you drive in the screws.
August 20, 2019
11 months ago
Woodworking Experience:
Love it works great and very easy to use.
July 23, 2019
1 year ago
Woodworking Experience:
Does what is promised
This product works great.
June 23, 2019
1 year ago
Woodworking Experience:
This rocks
This jig is easy to use and set up even with zero experience. The joints it creates are "Rock" solid. If you have never thought you needed this Think Again. No more dowels and messy glue or biscuits.
March 13, 2019
1 year ago
Woodworking Experience:
A real time saver
February 10, 2019
over 4 years ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 4 questions Browse 4 questions and 7 answers
Why did you choose this?
Rockler Store
I am building shelves to mimic the bathroom tile. This should make assembly much easier and faster
SAMUEL B on Jun 6, 2020
Had previous Kreg jigs before and wanted to upgrade
Ken on May 7, 2020
I am building shelves to mimic the bathroom tile. This should make assembly much easier and faster
SAMUEL B on Jun 6, 2020
I am making Adirondack chairs
Leon N on May 13, 2020
Had previous Kreg jigs before and wanted to upgrade
Ken on May 7, 2020
We have used a simpler Kreg. Big project coming.......
Alvin B S on Apr 13, 2020
good reviews and best value
S C on Nov 20, 2019
Good stuff ,well made and helps a lot!
Justin H on May 5, 2019
I have always needed one
Don M on Apr 19, 2019
on recommendation of friends who are using system and watching system being used on U Tube.
Jim F on Mar 8, 2019
To make home repairs
Mike L on Feb 8, 2019
Building cabinets / face frames
Anthony Y on Dec 9, 2018
Planning to build kitchen cabinets for my house
James R on Nov 21, 2018
Needed an additional tool for cabinet production that made it easier and quicker.
robert w on Jul 9, 2018
Graduation Gift
Bob R on Apr 23, 2018
Need to build a drawer box 5 times? Or more? And a bed frame to put it in? Turn a week project into a weekend project.
Vince Z on Dec 27, 2017
it was asked for
melissa a on Dec 8, 2017
Friends recommendation
Ken N on Dec 6, 2017
Building a table needed a pocket jig, saw it on u tube.
Gary F on Sep 7, 2017
tried to do it without a guide. Doesn't work
Ferdinand G on Jul 18, 2017
Decided to upgrade from the hand held version as I drill a ton of pocket holes frequently, this model will save me a lot of time.
Janet T on Apr 12, 2017
Kevin B on Feb 9, 2017
only bought this from Rockler because I had a gift card to use
Dennis P on Feb 7, 2017
This will help
raz on Jan 11, 2017
Put together picture fram
Lynn Q on Jan 11, 2017
Quality proven product
John P on Jan 7, 2017
Built Bathroom vanity
Clark C on Dec 30, 2016
Have used it for several years and is great to have in my shop
Gman on Dec 7, 2016
I chose the Keg jig to make projects easier and more stabile.. I first used it to build my garage doors.
Greg M on Nov 28, 2016
I have a basic kit for Kreg but needed an upgrade
MIKE L on Aug 29, 2016
It has been on my shopping list for a while!
Casey S on Aug 29, 2016
T. O on Aug 28, 2016
Kreg is the best jig for all types of woodwork when securely joints. Easy to use.
Rick D on Aug 11, 2016
need a better jig the the R3 model
jon b on Jul 21, 2016
Kreg makes a good pocket hole system
Mike S on May 28, 2016
J J on May 2, 2016
Had some finish work to do
EDGAR C on May 1, 2016
For making hanging shelves and tool drawers
Johnny B on Apr 15, 2016
Saw demo on You Tube. Great for Stiles and Rails in cabinet and furniture work. A Great time saver for production projects.
Richard S on Mar 20, 2016
I use pocket screws frequently and this kit greatly eases set up and hole drilling.
William on Jan 13, 2016
Christmas gift from my wife. Ain't she smart?
Philip H on Jan 2, 2016
Improve/expand my woodworking talents
THOMAS S on Dec 30, 2015
Project needs.
Daniel V on Dec 30, 2015
My husband put it on his Christmas list.
Patricia S on Dec 23, 2015
Free shipping and clamp included
Jim F on Dec 18, 2015
I need it.
Al W on Dec 17, 2015
Had prior Model. Works fantastic.
Ron B on Dec 13, 2015
Know Kreg to be a quality brand and I have projects suited to pocket hole joinery
Scott F on Dec 9, 2015
item was requested by my husband
Anne B on Nov 30, 2015
I purchased one of these systems for myself and was so taken with the quality and ease of use I wanted to get one for my son-in-law.
Paul C on Nov 30, 2015
Gift request
Christie H on Nov 30, 2015
Upgrading from single unit that I now have.
Michael R on Nov 29, 2015
I am making Adirondack chairs
Leon N on May 13, 2020
We have used a simpler Kreg. Big project coming.......
Alvin B S on Apr 13, 2020
Does this come with a project booklet?
Janice W on Dec 13, 2015
BEST ANSWER: I believe mine came with a dvd but I watch different videos on you tube and this thing is worth its weight in gold
I am going to build a kitchen table using 4x4 for legs and 2x4,6 for top What is the difference in the 4 and 5 jigs. Which should I buy?
Melvin V on Nov 13, 2015
BEST ANSWER: Both would work. The 4 has the clamp in the back and the 5 is in the front. So, it is really a preference/convenience thing. When you buy the kits, they do come with different accessories.
Can you add dust collection port to one without it included?
Melissa W on Dec 22, 2015
BEST ANSWER: This is a small, but very useful "hand tool," and the only "dust" generated is the thin spiral that follows the drill bit twist. One might get a small pile of shavings after a while, but barely enough to brush away once or twice.
I am going to build a kitchen table using 2x4 . Which jig do I need 4 or 5 for holes ?
Melvin V on Jul 8, 2015
BEST ANSWER: Tough to answer not knowing your table design. If you are referring to the number of screws per joint, I would think 4 should be sufficient.. Again, all depends on your design.