- M-type wrench tool is used for tightening and loosening collet chuck holders, simple to operate and improves work efficiency. - These wrenches are treated with special technology for high hardness and wear resistance, making the surface easy to keep clean and resistant to rust. - The red anti-slip handle is ergonomically designed, providing a secure grip with comfort during use. The design allows for efficient operation with reduced effort. - To use the wrench, place it securely on the chuck and turn clockwise to tighten or counterclockwise to loosen. Suitable for use with lathe and milling machines. 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