Woodhaven 4556 Portable Box Joint Jig Our Portable Box Joint Jig works by hop-scotching the jig over the work, instead of like our standard 4555 Box Joint Jig where the work hop-scotches over the jig. This allows you to safely and accurately cut larger box joints on large workpieces that are too cumbersome or dangerous to do any other way. Includes replaceable MDF Sub-fences, a 12" Ultra Track aluminum fence and two built-in clamps. Workpiece is clamped vertically in a vise and the Portable Box Joint Jig hop-scotches over each cut, indexing its aluminum stops in the previous cut. Youll need to supply a 6 clamp for use when making the first and last few cuts on the part that are out of range of the built-in clamps. See video on our website. Includes both stationary and adjustable aluminum stops which are infinitely adjustable between 1/2 to 1-9/16 wide joints, minimum 1/2 deep. These index the jig accurately for each cut and prevent side-to-side jig movement. Also includes five Setup Jigs for 1/2, 3/4, 1, 1-1/4 & 1-1/2 joints. Unlimited stock width. Requires a 1/2" shank router, a 3/4" bushing and a 1/2" router bit, all not included. If using your own bushing and not Woodhavens 5032K, make sure the nose isnt over 3/8" long. Any 1/2 cutting diameter bit with a 1/2 shank will work, but we recommend a spiral upcut bit for best results. Always select the shortest cut length possible. For best results, incremental passes are recommended. Lifetime guarantee against defects in material or workmanship. Made in the USA!