Made from specially formulated steel, these ballend hex keys are more efficient that a regular hex blade because they allow quick insertion from a variety of angles into hard-to-reach places. Work great in wide open spaces as well. Corrosion resistant and include organizing case that can be used for added torque. Kit Includes:1.5mm2mm2.5mm3mm3.5mm4mm4.5mm5mm5.5mm6mm7mm8mm9mm10mm