Here are free step-by-step instructions to build your own box joint jig.
When you do not want to interrupt a nice continuous grain pattern around all four corners of a box or small cabinet project with visible splines, the answer is to embed splines within the miter joint, where nobody can see them. This spline jig can assist you with that.
Instead of making three separate jigs for common woodworking joinery, Doug Blacke found a way to combine all three into one super jig.
Create perfectly fitting joints that don not need to be clamped. by Tim Johnson.