The channel letters we manufacture are created of aluminum and cut by a CNC router. The router generates the again from the channel and it is the basis for that letter condition. Returns, the edges on the letter, are then formed by bending a three- to 6-inch-broad strip of aluminum https://backlitchannelletters98653.win-blog.com/16114116/the-smart-trick-of-backlit-channel-letters-that-no-one-is-discussing