Each kit includes two robust, sure-grip handles made of one-of-a kind, grained American Maple and nine quickly-replaceable wires in three lengths and three gauges. Alternate lengths are perfect for different size projects: six-inch for pens, rings, and small vessels; nine-inch for bowls and other medium-sized projects; and 18-inch for bowls, plates, and other large shapes. Each gauge is color-coded so users quickly know just how wide their burn design will be: .016 gauge is red; .020 gauge is white; and .026 gauge is blue.​