It is a permanent and reliable fastening. new high quality. The and nose pieces are placed in a colored container labeled with metric and sae size are marked accordingly,1 piece and nose piece plastic box. It is suitable for many standard nut auction machines,metric M3 M5 M6 M8 M10 M12 and standard SAE 1/4-20, 10-24, 8-32, 6-32, 5/16-18, 3/8-16 Made of high strength steel. : - The and nose pieces are placed in a colored container labeled with metric and sae size are marked accordingly,1 piece and nose piece plastic box. - It is suitable for many standard nut auction machines,metric M3 M5 M6 M8 M10 M12 and standard SAE 1/4-20, 10-24, 8-32, 6-32, 5/16-18, 3/8-16 - new high quality. - Made of high strength steel. - It is a permanent and reliable fastening. Specification: - Material: Steel Size Chart: Size Approx: M3: 4cm/ 1.57inch : 4cm/ 1.57inch M5: 4.2cm/ 1.65 inch M6: 4.2/ 1.65 inch M8: 5cm/ 1.97inch M10: 5.2cm/ 2.05inch M12: 5.3cm/ 2.08inch 6-32: 4cm/ 1.57inch 10-24: 4.1cm/ 1.61inch 1/4-20: 4.2cm/ 1.65 inch 5/16-18: 4.3cm/ 1.69 inch 3/8-16: 4.4cm/ 1.73inch 8-32: 5cm/ 1.97inch Package Includes: 1 Piece Steel Hand er Note: Please allow 1-3mm measuring deviation due to manual measurement. 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. Thanks for your understanding and attention. Wish you a pleasant shopping experience