Product Description - 18 and 28 mm open-end wrenches The comes with two jaw widths: 18 mm and 28 mm. It can be used for mounting, dismounting and adjusting Shimano hubs with cone bearings. Made of hardened steel, the wrench is particularly strong and robust. Specifications:Function:installation & removal of cup & cone bearings, bearing play adjustmentTool Type:wrenchType:cone wrenchSize:18 mm, 28 mmTechnical Information:Material:steelFeatures:stable and durable due to hardened steelManufacturer Number:Y-20W04000 Contents:1 x Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com