This forms a secure and strong joint, but needs great care in marking out and cutting the work. The dovetails should not have too sharp angles, or they will be liable to be broken off. The fit may be tight, but not so tight as to require considerable force to effect a juncture, or the top and bottom dovetails may be split off. When a dovetail joint is used at a corner that is to be rounded externally, the joint should be made in the usual way first, and the rounding done afterwards.