For some time the Mitre Lock Joint has been a problem to accurately produce consistently. The difficulty is making a square joint, because one panel has to be machined flat and the other panel must be cut in the possibly unstable vertical position. THIS PROBLEM IS NOW SOLVED! Both panels are now able to be machined on the flat - where maintenance of accuracy is assured. Note: it is recommended that a router table be used to assist in the accuracy of the cuts. ALL CUTS ARE PRODUCED WITH THE PANELS ON A HORIZONTAL POSITION. Instructions are supplied.

STEP 1. First 45º tongue is produced in Panel 'A' using Bit No. 1.
STEP 2. Second 45º tongue is produced in Panel 'B' using bit No. 1 also.
STEP 3. The Trench is produced in Panel 'B' with Bit No. 2. A strip of waste is produced.
STEP 4. Line up panel 'A' tongue with trench in Panel 'B' then join.