Patented Wright Drive design distributes contact over a larger surface area for greater gripping power and strength.
| PART NUMBER | NOM. SIZE | SHAPE | L | DS | DD | BD |
|---|---|---|---|---|---|---|
| 3810 | 5/16" | I | 1-1/16" | 33/64" | 3/4" | 7/64" |
| 3812 | 3/8" | I | 1-1/16" | 39/64" | 3/4" | 5/32" |
| 3814 | 7/16" | I | 1-1/16" | 11/16" | 3/4" | 7/32" |
| 3816 | 1/2" | II | 1-3/32" | 3/4" | 3/4" | 13/64" |
| 3818 | 9/16" | II | 1-1/8" | 55/64" | 55/64" | 1/4" |
| 3820 | 5/8" | II | 1-1/8" | 15/16" | 15/16" | 9/32" |
| 3822 | 11/16" | II | 1-1/8" | 63/64" | 63/64" | 5/16" |
| 3824 | 3/4" | II | 1-3/16" | 1-1/32" | 1-1/32" | 23/64" |