How to Make Perfect Box Joints

After the first finger has been cut, remove the clamp from the jig and re-position the board so that the newly-cut notch slides onto the spacer block on the jig. Check to see that the edge of the board is flush with the table and re-clamp the board to the jig, as shown in the picture above.

Cut the second notch in the same manner that you cut the first.

Remove the clamp, adjust the board so that the second notch now slides onto the spacer, re-clamp and cut the third notch. Continue this procedure until all of the needed finger notches on this edge of the board have been cut. While your last cut might not be a complete cut or the last finger may not be of a full 1/2" width, just remember that when you run out of board, you've finished cutting notches.