The Black Diamond Metric Ball End Hex Key Set includes 13 metric sizes with ball-end tips that help you reach hex fasteners at an angle for easier access in tight or obstructed spaces. Sizes include 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, and 10mm to cover common metric applications. A practical set for assembly and service work when straight-on access isn’t always possible.