18-piece Hex Key Allen Wrench Set includes 9 pcs metric allen wrenches 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm; 9 pcs SAE allen wrenches 1/16, 5/64, 3/32, 1/8, 5/32, 3/16, 1/4, 5/16, 3/8 Inch, easily to complete work in various applications S2 steel treated with black phosphating enhances both slip and wear resistance, enabling it to withstand rotational impacts and abrasion. Enough strength and toughness allow it to endure pressure without deformation for long-lasting durability Hex keys are stamped with clear markings for easy selection and identification, ensuring you can quickly find the right size for your needs. Comes in a foldable hanging storage holder for space-saving and portability The ball end design of the hex key set enhances reach and allows access at a 25-degree angle, providing flexibility in tight spaces while reducing lateral pressure on nuts and parts to protect threads and fasteners L-shaped long side design provides extended reach and enhanced leverage and torque, make you more labor-saving. Chamfered hex tip ensures precise fastener engagement, reduces the wear of the hex wrenches and fastener head SK 18-Piece Allen Wrench Set, Metric & SAE Hex Key Set, L-Shaped, S2 Steel, Black Phosphating Finish