Box Joint Jig

Cut perfect box joints with this precision jig for your table saw or router table. Micro-adjustments and locking features ensure tight, accurate fits every time.

Create flawless, tight-fitting box joints quickly and easily with this precision-built box joint jig, designed for use on your table saw or router table. Featuring an innovative micro-adjustment system and secure locking mechanism, this jig takes the guesswork out of dialing in perfect joints. Unlike traditional jigs that require time-consuming trial and error, this jig lets you fine-tune both pin size and spacing in seconds—cutting joints ranging from ¼" to ¾" wide with incredible accuracy.

The heart of the jig is its adjustable metal key system, which ensures consistent spacing and alignment for perfectly interlocking joints. Once set, the dual-locking knobs hold everything firmly in place, so there’s no slippage mid-cut. Built primarily from durable hardwood and backed with a hardboard plate, this jig is built to last and perform.

Whether you're building boxes, drawers, or decorative joinery, this jig delivers professional-quality results on both the table saw and router table—making it a must-have for serious woodworkers looking to speed up production without sacrificing precision.

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What You Get:

  • 9 printable (digital) pages of step-by-step instructions
  • Over 30 full-color photos and illustrations
  • Full instructions on making and using the jig
  • Retail sources for hardware and supplies
  • Shop-tested guarantee from the editors of Woodsmith magazine

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Check out our Editor’s recommendations for project supplies and hardware. (We may receive commission when you use our affiliate links. However, this does not impact our recommendations.)

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