1/2" Drive Hex/Allen Key bit Socket Set Metric Sizes 4mm - 19mm AT659 : Amazon.co.uk: DIY & Tools
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Extra Long Allen Wrench Hex Bit Socket Set (10 Pack) - Long 6" Hex Bit in 3/8" Drive Sizes: 1/16", 1/8", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8", 7/16", 1/2" : Amazon.co.uk: DIY
10PCS 1/2" DR. Hex Bit Socket Set - TOPTUL The Mark of Professional Tools