These Non-Sparking S Type Double Box Offset 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.
| S1*S2 mm | L mm | Weight (g) | |
| Aluminum Bronze | Beryllium Copper | ||
| 6*7 | 90 | 40 | 45 |
| 7*9 | 90 | 50 | 55 |
| 8*10 | 100 | 70 | 80 |
| 9*11 | 100 | 80 | 90 |
| 10*12 | 110 | 110 | 125 |
| 12*14 | 125 | 140 | 160 |
| 14*17 | 140 | 200 | 230 |
| 17*19 | 170 | 270 | 310 |
| 19*22 | 185 | 370 | 420 |
| 19*24 | 185 | 400 | 450 |
| 21*23 | 185 | 430 | 490 |
| 21*26 | 185 | 435 | 500 |
| 22*24 | 210 | 600 | 670 |
| 23*26 | 210 | 600 | 670 |
| 24*27 | 225 | 640 | 720 |
| 24*30 | 225 | 650 | 740 |
| 25*28 | 225 | 670 | 750 |
| 27*30 | 250 | 780 | 870 |
| 30*32 | 275 | 980 | 1100 |