The Wera high quality bits with rough ribs (anti cam-out feature, ACR) to prevent any slipping out of the screw head, permanently magnetized, thus screws can be held securely on the tip of the bit

For Phillips screws
ACR (anti cam-out feature) to prevent any slipping out of the screw head
Permanently magnetized, thus screws can be held securely on the tip of the bit
With plastic sleeve, protects components from being damaged when screw driving
1/4"

Phillips screws Drive 1/4" hexagon, suitable for DIN ISO 1173-F 6.3 bit holders Design Tough, for universal use, ACR® (Anti Cam-Out Ribs) prevents bit from slipping out of screw head, permanently magnetized, thus screws can be held securely on the tip of the bit