The Bahco 9-Piece Hex Key Set features long arms that provide great leverage, making it easier to drive the fasteners. Additionally, the keys come with ball ends that allow them to be used at up to a 30-degree angle to the socket.The hexagonal ends ensure a solid fit into the screw or bolt head, while the black oxidised finish offers increased resistance to corrosion. For convenient storage and easy selection, the set comes with a compact sleeve-case.Sizes included: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm and 10mm.