135 Degree Gutter Angles are generally used to route the gutter around angle of a bay window, a design feature that is particularly prevalent on period style properties. The handing refers to the fact that one end of the angle is socketed to receive a plain ended length of gutter. The other end of the angle is a spigot which will fit into the socket on a length of gutter.You should always support a gutter angle by positioning a fascia bracket within 150mm on both sides of the angle. This will prevent the fitting from sagging when it is weighed down by water or snow.