Proline impact hex bit 1/2" H5 x 78 mm — screwdriver bit for impact drivers, model 18409

Proline impact hex bit 1/2" H5 x 78 mm is a hardened screwdriver bit engineered for use with 1/2-inch drive impact drivers and compatible sockets. The H5 hex profile and 78 mm overall length give additional reach for fastening and loosening hex fasteners in construction, mechanical repair and maintenance tasks. The bit is designed for heavy-duty impact applications and provides a balance of durability and fit to reduce cam-out when working with hex-headed bolts and screws.

Advantages

This impact hex bit is manufactured from hardened steel to withstand repeated high-torque impacts. The 1/2" drive interface ensures secure seating in impact driver chucks and sockets, while the H5 tip profile delivers accurate engagement with hex fasteners. The 78 mm length allows access to recessed or hard-to-reach screws without compromising control. The bit is suitable for continuous use in workshop and job-site environments where impact-rated accessories are required.

Suitable for

• Driving and removing hex head fasteners in construction assemblies
• Mechanical repairs and vehicle maintenance where extended reach is needed
• Maintenance tasks on equipment with recessed or hard-to-access bolts
• Use with 1/2-inch drive impact drivers and appropriate socket adapters

Key specifications

• Drive size: 1/2 inch
• Tip profile: H5 hex
• Overall length: 78 mm
• Material: hardened impact-grade steel
• Intended use: impact driver/sockets for heavy-duty fastening

How to use

Fit the Proline impact hex bit into the 1/2" drive chuck or socket adapter of an impact driver, ensuring it seats firmly. Align the H5 tip with the hex fastener and apply steady pressure while operating the impact driver at the appropriate torque setting. For removal, run the driver in reverse while maintaining control to prevent slipping. Inspect the bit periodically for wear and replace if tip deformation or excessive rounding appears.

Usage recommendations

Use impact-rated bits exclusively with impact drivers or impact-rated socket adapters; avoid using this bit in non-impact hand tools for applications requiring repeated high torque. Store in a dry tool case to prevent corrosion and keep matching tip profiles for best performance.