Ko-ken 1/2" Drive Deep Nut Twister Socket 21mm x 120mm KO4128L120M21

Ko-Ken is a Japanese precision tool brand supplying professional-grade sockets, socket sets, ratchets, and hand tools to automotive, engineering, aerospace, and industrial operations across Australia.

The Ko-ken 1/2" Drive Deep Nut Twister Socket 21mm x 120mm KO4128L120M21 is a precision Ko-Ken tool manufactured to professional grade for reliable performance in automotive, engineering, and industrial maintenance applications.

Where this product is used

Ko-Ken Nut Twister and Bolt Twister sockets are engineered to grip and remove rounded, corroded, or damaged fasteners that conventional sockets can no longer engage.

• Extraction of rounded, corroded, or previously stripped hex fasteners in automotive and industrial maintenance
• Recovery of damaged fasteners without drilling or fastener destruction where possible
• Fleet and workshop maintenance where fastener condition is variable and extraction is frequently required

Key specifications

Selecting the right option

Select by drive size and the nominal fastener size — Nut Twister sockets engage fasteners up to 2mm smaller than nominal, as the fastener is expected to be partially rounded. These sockets are single-direction tools for extraction only; they will damage correctly sized fasteners if used for installation.