Proline Socket Key CrV 3 mm Extended model 5484031 — chrome vanadium 3mm hex key, extended length

Proline Socket Key CrV 3 mm Extended (model 5484031) is an L‑shaped 3 mm hex key made from chrome‑vanadium steel with a hardness of 56–60 HRC. The tool has an overall length of 98 mm with a 20 mm extended shank, providing extra reach for fastening tasks in recessed or hard-to-reach areas.

Advantages

Constructed from chrome‑vanadium (CrV) steel for strength and wear resistance, this extended 3 mm hex key offers precise fit to hex fasteners and durable performance. The L‑shape gives leverage for torque application while the extended shank improves access to deep or recessed screws. The stated hardness (56–60 HRC) ensures resistance to deformation under normal workshop and maintenance use.

Suitable for

• Assembly and disassembly of small machinery and equipment
• Maintenance and repair in workshops and service centers
• Accessing recessed or deep-set hex fasteners
• Use with compatible bit holders and ratchets where extra reach is needed

Key specifications

• Type: L‑shaped hex key (socket key)
• Material: Chrome‑vanadium steel (CrV)
• Size: 3 mm
• Hardness: 56–60 HRC
• Length: 98 mm (overall) / 20 mm extended shank
• Model / MPN: 5484031
• EAN: 5903755484031

How to use

Insert the 3 mm end of the L‑shaped key into the hex fastener and apply steady turning force. Use the short arm for higher torque and the long arm for reach into recessed areas. When using with a compatible bit holder or ratchet, ensure secure seating before applying force. Avoid excessive impact or bending beyond intended torque limits to prevent tool damage.

Usage recommendations

For best results, keep the hex key clean and free of debris; inspect periodically for wear or rounding. Use the long arm for reach and the short arm for torque, and match the 3 mm size precisely to the fastener to reduce the risk of rounding or slippage.