Creation of The Flank Drive

At this time, the aviation industry was making advancements in reducing space and weight by modifying fasteners, but was struggling with rounding of the fastener corners upon removal. The Navy sought Snap-on to solve this dilemma.


The solution, called the Flank DriveĀ® Wrenching System, was issued two patents in 1965 and proved so popular that it spread throughout the Snap-on product line.