The angled & oblique nail trick on wood is a way of nailing the withers of angled and straight pieces where the position of the nails is slanted and on the angled pieces the position of the wood is slanted so that it is generally difficult to nail. With an easy way to nail this difficult position it will be very easy to nail it with accuracy and precision without changing the position of the wood, shifting or getting out of line. this method of nailing wood only uses a hammer and nails without other expensive tools. Hope it is useful