Box Bits 6 – Mitre Keys

Mitre Keys are a necessary strengthening method for mitred box corners, as well as being an aesthetic addition to the overall box presentation.The extra strength is required due to the small end grain gluing surface provided by mitred corners and the increased strength comes from the extra glue surface provided by the mitre keys and the slots cut into the carcass and lid to fit them, combined with the fact that the grain of the key stock runs at an angle across the mitre joint. Usually mitre keys are made from a stock that is of a contrasting colour to the area of the box they are fitted into thereby adding to the box presentation.

ref: http://www.woodworkforums.com/f246/box-bits-114898/#post1079084

pdf: Box Bits 6