Wera 840/1 ZBO Hex Pinned Security Bit Extra Tough

The Wera 840/1 ZBO Hex Pinned Security Bit Extra Tough is a professional-grade screwdriver bit engineered specifically for hexagon socket screws featuring a security pin (BO = with bore hole). These tamper-proof screws contain a protruding pin within their drive profile, meaning standard hex tools are rendered useless — only a compatible BO bit like this one can engage and operate them.

Wera's proprietary Hex-Plus profile is the key to this bit's performance. By increasing the contact surface area within the screw head, Hex-Plus dramatically reduces the notching effect that causes rounding and damage, helping your screw heads last longer and your work stay precise.

Available in hex sizes from 2mm to 6mm, all at a 25mm working length, these bits offer the versatility to tackle a broad range of security fastening applications. Sold individually.

Features and Benefits:
• Hex-Plus profile increases contact surface for reduced screw head damage
• Designed for hexagon socket BO screws with security pin — resists unauthorised removal
• Extra tough construction suited to hard materials and demanding applications
• 1/4" hexagon drive (Wera connecting series 1), compatible with holders to DIN ISO 1173-D 6.3