- M-type wrench tool is used for tightening and loosening collet chuck holder, simple to operate and improves work efficiency. - These wrenches are treated with special technology, providing high hardness and wear resistance, making the surface easy to keep clean and resistant to rust. - The red anti-slip handle is ergonomically designed, slip-resistant and durable, offering a comfortable grip, combining functionality with practicality. Designed to provide a secure hold and reduce effort during use. - To use the wrench, first engage it securely and hold the end firmly. Tighten by turning clockwise and loosen by rotating counterclockwise. Suitable for use with lathe and milling machine applications. Specification: Type: M Type Model: ER16, ER20 Material: Steel, Rubber ER16 Wrench Size (Length x Open): Approx. 120 x 12mm ER20 Wrench Size (Length x Open): Approx. 132 x 17.2mm Package Includes: 1 x ER16 M Type Wrench Spanner 1 x ER20 M Type Wrench Spanner