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Sealey

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

Check contents · United Kingdom

All retailer prices (3)

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Power Tools Direct

Reported available

Observed 15 Oct 2026

£2.71

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Visit Power Tools Direct ↗

Tooled Up

Reported available

Observed 12 Oct 2026

£4.95

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Visit Tooled Up ↗

My Tool Shed

Reported available

Observed 12 Oct 2026

£4.95

Delivery: check retailer

Visit My Tool Shed ↗

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About this tool

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

Retailer description · Tooled Up · Observed 12 Oct 2026. Check the retailer’s listing for full specifications and contents.

Product details

Brand: Sealey
Barcode / GTIN: 05051747360761
Category: Hand tools
Pack format: Check contents

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