Stahlwille 40030405 4mm & 5mm Double Open Ended Spanner
SPEEDWOX Mini Wrench Set Metric 10 Pcs Ignition Wrench Sets 4mm-11mm Open End and Box End Combination Spanner Wrench Set with Storage Pouches and Key Chains for Assembling Furniture Small Equipment :
US PRO 10pc MINI COMBINATION SPANNER SET 4mm to 11mm small metric wrench tools 5060478385004 | eBay
Draper 4mm X 4.5mm Elora Midget Metric Double Open End Spanner SPANNERS AND WRENCHES : Amazon.co.uk: DIY & Tools
Force 4mm Metric Combination Spanner - 75504 - TradeTools | Huge Range, Great Service