Professional tool for commercial or occasional use. 9 pc ball ended metric Allen keys Manufactured from chrome vanadium steel Hex key type ball ended Chamfered ball point end on one side to allow work to be done at angles up to 25 degree SIZES INCLUDE : 1.5mm (total length 90mm) 2mm (total length 100mm) 2.5mm (total length 115mm) 3mm (total length 130mm) 4mm (total length 140mm) 5mm (total length 155mm) 6mm (total length 180mm) 8mm (total length 200mm) 10mm (total length 220mm)