Extension bar YATO YT-1247, chromium-molybdenum steel, 127 mm, 1 pc

YATO YT-1247 is a single-piece extension bar made from chromium-molybdenum steel, 127 mm long and supplied as one piece per pack. It is designed to extend the reach of sockets and ratchets, allowing access to recessed or hard-to-reach fasteners in automotive, maintenance and mechanical applications. The solid construction provides consistent performance when used with compatible socket sets and torque tools.

Advantages

The chromium-molybdenum steel construction delivers enhanced strength and resistance to wear compared with standard carbon steel extensions. A single-piece design minimizes flex and potential failure points under load, while the 127 mm length provides a balance between reach and control. The bar is compatible with common square drive sockets and ratchets, offering reliable torque transfer and a durable working life when used within recommended torque limits.

Suitable for

• Accessing recessed nuts and bolts in engine bays and machinery
• Extending reach on ratchets and torque wrenches for maintenance tasks
• Work in automotive repair, industrial maintenance, and general mechanical assembly

Key specifications

• Material: chromium-molybdenum steel
• Length: 127 mm
• Configuration: single-piece extension bar
• Quantity in pack: 1 piece
• Drive type: square drive compatible with standard socket sets

How to use

Select a socket that matches the fastener size and attach it securely to the extension bar. Connect the extension bar to a compatible ratchet or torque wrench by inserting the square drive and engaging the locking detent if present. Position the socket over the fastener and apply torque with steady, controlled movement; avoid sudden shocks or excessive force beyond the rated capacity of your tools. After use, clean off grease and debris and store the extension bar in a socket rail or tool drawer to protect the drive surfaces.

Usage recommendations

Use the extension bar with sockets and drivers that match the same square drive to ensure proper fit and torque transfer. Avoid using cheater bars or applying impact tools unless the extension and associated tools are rated for impact use. Regularly inspect the drive and the locking surfaces for wear or damage, and replace the extension if any deformation or excessive wear is observed.