Arrowhead joints are similar in construction to log cabins.They are built up one layer at a time. This allows an all-tails type construction.The angles used are greater than a normal dovetail and the arrowhead designbecomes apparent after the box is constructed and the corners are chamfered ata 45-degree angle. It gets its strength from the dovetails and the long edges of the boards being glued. Construction requires very accurate angles and equal board dimensions.