Hey Jeff, Scotty Cameron website under Archive.... At first glance, the Squareback 2 may appear exactly the same as a Squareback 1, but with a plumbing neck. Take a longer look and Scottys subtle design differences are revealed. To give players a bit more toe flow than the nearly-face-balanced Squareback 1, Scotty moved the neck slightly back toward the heel. Also, the plumbing neck is a mid-length neck, which aesthetically accommodates the boxier, crisper lines of the Squareback 2 at setup. The Squareback 2 maintains the same headweight as the Squareback 1, but it has a slightly thinner topline and a thicker cavity wall. Hope that helps