Allows Simple Adjustment of Spring Preload or Adjust Height without Damaging Shock or Spring Collars Material: Steel, and Compact Design,Easy to Use The Jaws can Open out or up,Allows a Wide Variety of Preload Collar Sizes from 2 to 4-3/4 Inches. Please check with the size details before order. The Rivet Stamped a Little Bit Hard,it become Loosen after Long Time Use. Head Style: Open End Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Color:As Shown Material:Metal Package Contents: 1 x Spanner Wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.