Extra Long Allen Wrench Hex Bit Socket Set (10 Pack) - Long 6" Hex Bit in 3/8" Metric Drive Sizes: 3mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, and 10mm :
Allen Hex Socket Bit Key 9mm For MANY Brake Calipers 1/2 Drive 100mm long LL | eBay
Hex Socket Bit 9mm 1/2"Sq Drive
Titan Tools 15609 3/8-Inch Drive x 9mm Hex Bit Socket : Amazon.co.uk: DIY & Tools