These Non-Sparking Crow Foot Box End 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.
| C inch | S inch | L mm | Weight (g) | |
| Aluminum Bronze | Beryllium Copper | |||
| 3/8 | 7/16 | 29 | 30 | 35 |
| 1/2 | 31 | 35 | 40 | |
| 9/16 | 33 | 40 | 45 | |
| 5/8 | 38 | 45 | 50 | |
| 11/16 | 41 | 50 | 55 | |
| 3/4 | 43 | 60 | 55 | |
| 1/2 | 7/8 | 48 | 70 | 80 |
| 1 | 52 | 75 | 85 | |
| 1-1/16 | 54 | 80 | 90 | |
| 1-1/8 | 56 | 90 | 100 | |
| 1-1/4 | 62 | 130 | 145 | |
| 1-5/16 | 66 | 150 | 170 | |
| 1-1/2 | 72 | 170 | 190 | |
| 1-5/8 | 76 | 180 | 210 | |
| 2 | 89 | 200 | 230 | |