CruzTools Shock Spanner Tool An ideal tool for adjusting pre-load on a shock, this spanner is produced of tough stainless steel and is small enough to toss in your tool kit. Features: Allows adjustment of shock pre-load and is small enough to fit into your small tool kit and will fit any shock Constructed of stainless steel that is strong and will not corrode Fits a variety of metric cruiser shocks and is compatible with most any shock Total ID is 64mm, but will work with applications smaller and larger