Socket Bit Proline 1/2" Hex Impact H17 x 78mm — model 18438

Proline 1/2" Hex Impact Socket Bit H17 x 78mm is a single-piece hexagon bit designed for use with 1/2" drive impact wrenches and ratchets. The H17 profile fits hex bolts and fasteners with a 17 mm across-flats dimension. With a 78 mm overall length, this impact-rated socket bit provides reach into recessed fasteners while maintaining compatibility with common impact tools. The bit is intended for repetitive fastening and loosening operations where a durable, impact-capable accessory is required.

Advantages

The impact socket bit is manufactured to withstand the torsional shocks generated by pneumatic and electric impact wrenches, reducing the risk of rounding fastener heads. Its 1/2" drive interface ensures secure connection to standard impact sockets and adapters. The extended 78 mm length improves access to bolts located in tight or recessed areas without sacrificing torque transfer. The hex H17 profile offers stable engagement with 17 mm hex fasteners for consistent performance in assembly and repair tasks.

Suitable for

• Automotive repair: wheel, suspension and engine fasteners
• Mechanical assembly and disassembly
• Maintenance tasks in workshops and industrial environments
• Work requiring extended reach to recessed hex bolts

Key specifications

• Drive size: 1/2" (0.5 inch) compatible with 1/2" impact drives
• Tip profile: hexagon (H17) for 17 mm fasteners
• Overall length: 78 mm
• Intended use: impact-rated for pneumatic and electric impact tools
• Material and finish: designed for strength and wear resistance (manufacturer standard)

How to use

Select the Proline H17 impact socket bit and secure it in the 1/2" drive chuck or onto a compatible adapter. Ensure the bit is fully seated before operating the impact wrench or ratchet. Place the hex tip onto the fastener, apply steady contact, and operate the tool using appropriate torque settings and safe working technique. After use, inspect the hex profile for wear and replace the bit if deformation or significant rounding is observed.

Usage recommendations

Use with 1/2" impact-rated wrenches and adapters; avoid using hand-only ratchets for heavy impact applications. Match the bit to the correct 17 mm fastener to minimize rounding. Store in a dry toolbox and replace if the hex edges become rounded or damaged.