Wolf Tooth GnarWolf ISCG-05 Chain Guide - Infinite chainline adjustment between 48mm and 54mm via an elliptical expanding mandrel. There are no shims required! - Infinite vertical adjustement 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 - Designed to fit on any bike with an ISCG 05 Mount - For 1x use only - Material 7075-T6 with Stainless Steel Hardware - Weight: 44g. - Made in the USA