Dimensions: As the picture shows Material:Black Oxide coated,Heat Treated High Carbon Steel. Perfect Fit: Standard Castle Nuts And Commercial Castle Nuts, Fits all an Outer Diameter Of 1/4 Inches Higher Quality:You will fully appreciate the workmanship and quality of this Spanner Nut Wrench when it arrives. Worry Free After Sales: If you are not satisfied with our products, please feel free to contact us and we will take action to your satisfaction within 24 hours.Dimensions: As the picture shows Material:Black Oxide coated,Heat Treated High Carbon Steel. Perfect Fit: Standard Castle Nuts And Commercial Castle Nuts, Fits all an Outer Diameter Of 1/4 Inches Higher Quality:You will fully appreciate the workmanship and quality of this Spanner Nut Wrench when it arrives. Worry Free After Sales: If you are not satisfied with our products, please feel free to contact us and we will take action to your satisfaction within 24 hours. Dimensions: As the picture shows Material:Black Oxide