雙六角批頭套筒與三方批頭套筒不可互相通用
在雙六角規格上使用三方工具會導致螺栓頭損毀
一般而言,三方工具多用於歐系車款,雙六角工具多用於日系車款
三方六角套筒角度為90°,雙六角套筒角度為120°

| Dimension C, Drive End O.D., mm | 18 |
| Dimension D, Replacement Bit | FADM8LE2 |
| Dimension A, Overall Length, mm | 121.9 |
| Country of Origin | USA |
| Dimension B, Exposed Bit Length, mm | 95 |
| Size, mm | 8 |
| Finish | Chrome |
| Square Drive, inches | 3/8 |