Introducing the 840/4 Z bits from Wera, a series of high-quality bits for socket head screws. They are extremely strong, designed with Hex-Plus profile that offers greater contact area in the head of the screw, perfect for reducing damage and premature breakage.

• Screwdriver bits for socket screws
• Hex-Plus
• Ductile and tough for hard materials 1/ 4 in. hexagon drive
• Reduces wear
• Compatible with Drill & Drill Drivers
• Universal Applications