These Non-Sparking Adjustable Hook Wrench are made of Aluminum Bronze and Beryllium Copper, it is a high quality grade beryllium copper alloy material and a standard grade aluminum-bronze alloy. These tools are non-magnetic and non-corrosion, very suitable used for LPG and LNG vessels, and oil-gas industry etc.
| D mm | L mm | Weight (g) | |
| Aluminum Bronze | Beryllium Copper | ||
| 19-50 | 162 | 110 | 120 |
| 32-75 | 205 | 235 | 260 |
| 50-120 | 288 | 460 | 515 |
| 115-170 | 310 | 600 | 670 |