Dado Jig -

Exact Width Dado Jig uses the material fitting into the dado to set the dado width Slot · Carbide Head · Bowl Bits · Juice Groove · Metric · Pattern · Carbide

Essentially, it involves creating a slot or trench, known as a dado, in one piece of wood Another piece of wood is then cut to fit snugly into this slot,

zoom engine slot How to safely use a circular saw to create a slot or dado joint in dimensional lumber 715 views

eye of the amulet slot Then use the calipers to measure the width You will most likely find that your bit is actually 249 wide, which will result in the dado slot