Screwdriver Bit Wera 851/1 IMP DC PH 2 x 25 mm, Phillips PH2, impact-rated, 25 mm length

Wera 851/1 IMP DC PH 2 x 25 mm is a Phillips PH2 screwdriver bit intended for use with impact drivers and power tools. The 25 mm working length provides a solid balance between reach and control for common fastening tasks. Manufactured for impact-rated applications, the bit offers reliable engagement with PH2 fasteners in assembly, repair and maintenance operations for both professional and DIY environments.

Advantages

The impact-rated construction increases resistance to mechanical stresses and reduces the likelihood of tip deformation during high-torque applications. The PH2 geometry ensures accurate seating in Phillips head screws, minimising cam-out and wear. A standardized 1/4" hex shank allows fast and secure fitting into bit holders, impact drivers and quick-change chucks. The compact 25 mm length supports good control in confined spaces while still providing sufficient reach for most common fasteners.

Suitable for

• Driving Phillips PH2 screws in furniture assembly and cabinetry
• Automotive and mechanical repair tasks requiring impact-rated bits
• Electrical and HVAC installations where frequent fastening is needed
• General maintenance and renovation work with power drivers

Key specifications

• Tip type: Phillips PH2
• Working length: 25 mm
• Shank: 1/4" hex compatible
• Rated for: impact driver and power tool use
• Material and heat treatment: hardened for wear resistance (impact-rated)

How to use

Insert the 1/4" hex shank of the bit into the driver’s chuck or magnetic bit holder until it seats securely. Select the appropriate torque and speed settings on the impact driver or power tool for the screw size and material. Position the PH2 tip centrally in the screw recess and apply steady axial pressure while driving. Periodically inspect the tip for wear and replace the bit if the tip profile becomes rounded or damaged.

Usage recommendations

Use the bit with compatible impact drivers and avoid prolonged use at excessive torque settings on delicate fasteners or brittle materials. Store the bit in a protective holder to prevent tip damage and to maintain precise fit with Phillips screws.