Jet 17-Piece Extra Long Ball Nose Hex Key Sets are up to 30% longer than conventional hex keys. Improves reach and provides more torque. Hex end for extra torque - use for initial loosening and final tightening. Ball nose allows angle entry - perfect for blind applications. Super bright finish for excellent rust resistance. S2 alloy steel hardened to HRC58-62 allows 50% more torque than CrV keys. Improved folding case for easier access to smaller sizes. Exceeds ANSI standards for hardness and torque.