Jig provides slot hole required in 127x127mm posts to suit panel bottom/mid rail and also, top rail
New post slot holes may be required if stepping panels for sloping ground or if panels are height adjusted requiring change of distance between standard post slot holes
Route hole prior to post installation
Jig suits use with 6.35mm 1/4” trimmer with 16mm diameter guide (eg Makita 3707FC trimmer)