Socket with BERNER Flank Drive (BFD+) for more contact surface to the screw or bolt. More rounded in the corner to take higher torque and prevent for getting stuck on the hexagon
Knurling around for a safer grip with slippery fingers and also a fast turn without ratchet
Rounded corner on the square drive for a fast and save connection with the ratchet
Very high durable
Perfect fitl
Made by DIN 3124
Surface Matt satin so it is glare free for a safer work