1. Made of carbon steel material for wear resistance and durability.2. Rubber handles for anti-slip and comfort grip.3. Used to tighten or loosen clamping nut, etc.4. Suitable for ER lathe clamping nut, CNC milling lathe chuck nut, and most tool holders, such as spring clamping nut CNC tool holder.5. Easy to use, practical and convenient.Specification:Fit for: ER20M NutOverall Size: 135 x 12mm / 5.31-inch x 0.47-inch (L*T)Opening Width: 16mm / 0.63-inchMaterial: Drop Forged Carbon SteelHandle Material: RubberFinish: Black OxidizedPackage Content:1 x M Type Spanner.
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