Adopted high-quality alloy steel and throughout swaged forging process.
Proof loaded at 2 times the Working Load Limit. Minimum Ultimate Load is 4 times the Working Load Limit.
Heat Treated.
There are signs such as Working Load Limit in the link
| Working Load Limit |
A |
C |
D |
E |
K |
L |
自 重 |
| 0.5 |
22 |
22 |
16 |
12 |
12 |
80 |
0.24 |
| 1 |
30 |
27 |
20 |
17 |
20 |
96 |
0.7 |
| 2 |
31 |
30 |
25 |
20 |
21 |
110 |
1.3 |
| 3 |
40 |
53 |
32 |
25 |
31 |
154 |
2.8 |
| 5 |
50 |
56 |
40 |
27 |
36 |
184 |
3.3 |
| 8 |
56 |
61 |
40 |
30 |
38 |
205 |
5.7 |
| 10 |
56 |
66 |
40 |
30 |
42 |
215 |
6.7 |
| 15 |
105 |
94 |
70 |
45 |
70 |
302 |
21.5 |
| 37 |
108 |
118 |
115 |
57 |
85 |
462.5 |
46 |