3/8" Drive Long Ball End Hex Bit Metric Socket 5mm - Gearwrench
Amazon.com: 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 :
5mm Allen on Sale - anuariocidob.org 1686367990
Halfords Advanced Hexagon Socket 5mm 3/8" Drive | Halfords UK