This IRWIN T10757 Long Arm Ball End Hex Key Set contains a selection of keys manufactured from chrome vanadium steel for strength and durability. Heat-treated, so the metal resists rust and corrosion. One end has a routered tip finish for improved gripping and holding of screws. The other has a ball point that permits turning of up to a 30º angle. Its long arm design allows access to deep set screws or difficult to reach places. Supplied in a plastic holster that keeps wrenches together for easy storage. Metric Sizes 1.5, 2, 2.5, 3, 4, 5, 6, 7, 8 and 10mm