3 8" Drive Hexagon WallDrive Socket Metric 3 8" 21mm

The 21mm socket serves specialist applications in automotive and machinery work where this less common metric size is specified. This 3/8" drive variant pushes the capabilities of this drive size, making it ideal for situations where accessibility is paramount but adequate torque is still required. Cold-forged from Chrome Vanadium steel and heat-treated for enhanced strength, this socket handles demanding fastening tasks. The innovative WallDrive® configuration grips fasteners on their flats, delivering superior torque whilst significantly reducing the risk of corner rounding. The mirror-polished chrome finish combines visual appeal with practical corrosion resistance, whilst the knurled ring provides essential grip security.

Features and Benefits:

• 21mm hexagon size for specialist applications
• Cold-forged and hardened for maximum strength
• WallDrive® design maximizes torque and protects fasteners
• Mirror-polished chrome plating
• Knurled grip ring for confident handling
• Lifetime guarantee

Specifications: Brand: Premier Depth: Standard Drive: 3/8"Sq Material: Chrome Vanadium Nett Weight: 0.07kg Size: 21mm