Hex Allen Socket Bit 1/2" Proline H7 x 140mm (Proline 58521)

Proline Hex Allen Socket Bit 1/2" H7 x 140mm is a solid-drive tool intended for use with 1/2" ratchets and extensions. With a H7 hex profile and a 140 mm overall length, the bit provides extended reach for recessed or hard-to-access hex fasteners. It is compatible with standard 1/2" square drives and is suited for applications in automotive repair, mechanical assembly and general maintenance where a robust hex bit and additional reach are required.

Advantages

The hex Allen socket bit is manufactured to provide a precise fit on H7 hex fasteners, reducing slippage and rounding of screw heads. Its 1/2" drive interface ensures secure connection to ratchets and extensions for higher torque transfer. The 140 mm length offers improved accessibility in deep or confined spaces while maintaining sufficient stiffness for controlled torque application.

Suitable for

• Automotive repairs involving hex bolts and set screws
• Mechanical assembly and disassembly tasks
• Maintenance work in workshops and industrial settings
• Situations requiring extended reach with a 1/2" drive

Key specifications

• Hex size: H7
• Drive type: 1/2" square drive
• Overall length: 140 mm
• Material: hardened tool steel (manufacturing standard for solid socket bits)
• Profile: internal hex (Allen / imbus) socket

How to use

Insert the hex Allen socket bit into a compatible 1/2" ratchet, breaker bar or extension. Engage the hex profile fully with the fastener to avoid cam-out; apply steady torque while keeping the bit aligned with the screw axis. For tightening, turn until the required torque is reached; for loosening, apply controlled force to prevent rounding. If using with an extension, ensure the connection is secure before applying high torque.

Usage recommendations

Use the bit with tools rated for 1/2" drives and avoid impact use unless the bit and tool are specified for impact applications. Inspect the hex profile and drive connection for wear before use and replace the bit if deformation or excessive wear is present. For precision torque requirements, use a torque wrench with the appropriate adapter.