This bond hastwostretchers between every header with the headers centred over the perpend between the two stretchers in the course below in the bond's most symmetric form.The great variety of monk bond patterns allow for many possible layouts at the quoins, and many possible arrangements for generating a lap. A quoin brick may be a stretcher, a three-quarter bat, or a header. Queen closers may be used next to the quoins, but the practice is not mandatory.