| Chrome-vanadium special heat treatment provides a strong thin wall |
| Unique open end Non-slip design allows you to remove damaged fasteners including up to 70% rounded off bolts and nuts |
| Spherical box end design can open various kinds of nuts, such as spline, 12 points, square, 6 points, even the 6 point 50% rounded off nuts |
| Includes sizes: 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm |