The Keller Pro Series jigs are simply aluminum templates (with bits included) that come in pairs (for pins and tails) and are supplied in three sizes, all longer and thus more versatile than the other clamp-on jigs.

The templates are mounted on shopmade backer boards. There’s a less expensive Journeyman system made from phenolic resin that comes in two sizes, 15 in. ($159) and 22 in. ($239). These combine the tails and pins on one template, requiring the user to make just one backer board.

As with all clamp-on jigs, test cuts are needed at the very beginning to adjust the pins’ template on its backer board, but on the Keller a helpful scribe line gets you close. (Quick tip: Before flipping over or replacing a chewed-up backer board, clamp another board to the template to record the correct position.)

The system is very easy to use: The tails are cut first, and then the tail board is used to register the pin board. Just clamp on stop blocks for repetitive work. The 16-in. length might be all you need. It is more affordable, yet because it can be slid along the workpiece, with careful layout it will handle the deepest blanket chest.

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