Item Descriptions: -ER16 wrench spanner size: 120 x 20 x 7 x 13mm 4.72 x 0.78 x 0.28 x0.51 inch -ER20 wrench spanner size: 135 x 28.5 x 9 x 17mm 5.31 x 1.12 x 0.35 x 0.67 inch -ER20 wrench spanner size: 140 x 35 x 12 x 20mm 5.51 x 1.38 x 0.47 x 0.79 inch -Material: Made of alloy, overall heat treatment, high hardness, large torque and long service life. -Electrophoresis: The surface is processed by a special process, with high wear resistance. -High bite accuracy: Three size to meet your need. Package: 1 x ER16 M Type Wrench Spanner 1 x ER20 M Type Wrench Spanner 1 x ER25 M Type Wrench Spanner Item Specifications: Type:M Type Model:ER16, ER20, ER25 Surface treatment:Electrophoresis Color:Red Material:Alloy