Developed in 2001, there's the LOX-Recess drive, made of four square recesses overlapped. LOX-Recess
The LOX-Recess screw drive was invented by Brad Wagner, and fasteners using it are distributed by licensees Hitachi, Dietrick Metal Framing, and Grabber.[38] The design is four overlapping square recesses, with 12 contact points, and is designed to tolerate more torque, decrease wear, and avoid cam-out.[39]
intersting reading: https://en.wikipedia.org/wiki/List_of_screw_drives

LCHIEN
Loring in Katy, TX USA
I have too many now.
Comment