“Place an order, it is processed the next business day. Most likely same day if you don't place it at midnight local time. You can track the parcel online. And 6 days later the delivery guy is knocking on my front door. Unbelievable, you get high quality tools and equipment, California to Australia in 6 days. Amazing, LMI is the only place to buy..."

Rod Brisbane, Australia

Neck Joint Jig and Templates

  SPMTKS/SPMTKD neck joint jig

  SPMTKS/SPMTKD neck joint jig 
with SPMTS template.

  SPMTS straight mortis & tenon template
  SPMTD, dovetail mortis & tenon template

O'Brien Neck Joint Jig
Robbie O'Brien has designed this easy to use neck joint jig to determine your neck angle and then route either a dovetail or straight mortise and tenon neck joint. This jig kit comes with all the assembly hardware, a straight or dovetail mortise and tenon template set (your choice), a 5 page CAD plan and a DVD – all you supply is the wood! The 4 part in-depth video, fully illustrates how to assemble and use the jig, and has many helpful hints for making easy work of this often difficult task.

LMI Mortise and Tenon Templates
The LMI mortise and tenon templates (SPMTS, SPMTD) are designed to be used with the O'Brien Neck Joint Jig, but they can also be used separately. They are manufactured from 1/4 inch mdf to keep the price reasonable. If you expect to use these templates more than a few times in your shop, we recommend flooding the adjustment slots with cyano-acrylate glue to harden them a bit and prolong the life of the jig.

You need to use a 5/8 inch OD router guide bushing when using these templates. Sets of guide bushings can typically be purchased wherever routers are sold.  Our 3/8 inch bit (SPRB38) works well for hogging out the material on a dovetail–then you can follow with the 7 degree dovetail bit (SP7DT). Use the 1/2 inch straight bit (SPRB12) for use with the straight mortise and tenon template.

Router bits are not included with the kit.

The dimensions of the mortise and tenon prior to fitting them are:

  • Mortise - 7/8" (.875")
  • Tenon - 15/16" (.938") The tenon is slightly oversized so you can remove just a bit of material and get a perfect fit.

PLEASE NOTE: The dovetail mortise and tenon templates are different lengths to accommodate the offset created by the template guide when routing the dovetail mortise.


SKU Product Name In Stock Each  
SPMTKS Neck Angle/Mortise and Tenon Jig, straight
Yes $121.75
SPMTKD Neck Angle/Mortise and Tenon Jig, dovetail
Yes $121.75
SPMTS LMI mortise & tenon template, straight
Yes $31.45
SPMTD LMI mortise & tenon template, dovetail
Yes $31.45
SPRB38 Router bit, straight cut, 3/8" cutter, 1/2" shank
Yes $16.85
SPRB12 Router bit, straight cut, 1/2" cutter, 1/2" shank
Yes $18.85
SP7DT Router bit, 7° dovetail, 3/4" depth of cut, 1/2" shank/cut diameter
Yes $22.84