Product introduction: Suitable for bending wires, winding coils to produce wires of different diameters and sizes, very suitable for customers who are professional or interested in handicraft production. Round mouth size: 13mm, 16mm, 20mm. Product size: 16x5.7cm. Material: mixed steel. Notice: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Please allow 1-2cm measuring deviation due to manual measurement.