Features Hardened Steel: CNC mill spindle open end wrench is made of hardened steel with exquisite workmanship and rugged, practical. Bending Resistance: CNC mill spindle open end wrench is made from carbon oxygenation through hole internal cooling and bending resistance. Accurate Bite: CNC mill spindle open end wrench is with accurate bite and clamping and not easily sliding, work efficiency improving. Non Slip and Blueing Process: CNC mill spindle open end spanner is non slip and after blueing process and very durable. Ergonomic Handle: The CNC mill spindle open end spanner's handle is ergonomic and comfortable to use, labor saving. Specification: Item Type: CNC Mill Spindle Wrench Material: 45 Steel Package List: 1 x CNC Mill Spindle Wrench Package List 1 x CNC Mill Spindle Wrench