9pc Metric Ball End Hex Key Set

For loosening and tightening hex head screws
Heat treated, precision machined, chrome vanadium steel keys slide into an indexed plastic storage case
The ball end allows use at angles up to 25˚ and greatly increases versatility
Includes 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm