Updated with new head shape and lower cost. Infinite chainline adjustment between 48mm and 55mm via an elliptical expanding mandrel. There are no shims required. Infinite vertical adjustment between 28t and 36t round rings (28t-34t elliptical). Loosen one screw to flip the guide out of the way for easy chain removal without losing any of the guide's adjustments. All adjustments made with common 4 mm hex key. Designed for the rigors of Enduro, heavy trail, mud and even DH riding, the Wolf Tooth engineers made this guide extremely stiff and strong while keeping it light at 44g. Specific guide shaping is optimized for use with elliptical/oval and round chainrings. Design and manufactured in Minneapolis, MN USA.Item Specifications: Color, Black, Model Name, GnarWolf V2, Mount, Braze-on, Range,.