Description: Applicable: C hook spanner is suitable for ER25 nuts, 37mm (1.46 inches) opening width.Premium Material: C hook wrench is forged with carbon steel, with good toughness, wear resistance and high hardness.Anti Slip Handle: The red rubber handle provides a comfortable feel, ergonomic design, and ensures optimal power transmission.Function: C type wrench spanner is used to drive key screws, threaded rings and shafts. Accurate fit reduces the risk of damage to shafts, nuts and housings.Scope of Application: C hook spanner is suitable for ER swivel clamping nuts, CNC milling machine chuck nuts and most tool holders, such as B. Spring clamping nut CNC tool holder. Specification: Material: SteelProduct Size: 190mm Package Includes: 1 C Hook Spanner Note: Please allow slightly errors 1-2cm differences due to manual measurement.