CORNER DROP/ELBOW DROP fitting is used to turn the direction of the gutter in 90 degree along with an outlet. Lines running through the edges ensures strength along with aesthetics. It locks the gutter inside the clip which prevents the edges from flipping out. Outlet size is 160 MM (6 inches round). The large outlet size proportional to the gutter width ensures smooth & fast drain. Use self-screws to fix the gutter. Use silicone sealant inside the slot first and then slide the gutter inside it. Solvent cement is not required.