Screw-fastened or bolt-on QualityForks are mainly used on lift trucks or attachments. Drills in the fork back offer mounting with screws. 

Drill patterns are not standardized. As a result of the drill hole and the resulting fatigue notch, the capacity of screw fastened forks is lower than the capacity of standard forks with a comparable cross-section.

The two following versions of drillings are well-established.