PREMIUM MATERIAL - Allen keys heat treated chrome vanadium steel construction with matte surface and 58-62HRC hardness boasts rugged strength, rust resistance and maximum durability and stands up to the harshest environments DRIVE END AND CHAMFERED TIP - 9 PCS allen hex wrench set with conventional drive end on both long and short keys and precisely machined and chamfered hexagonal tips for a snug fit and smooth insertion into fasteners, reducing wear on the wrench and damage to fastener head EFFICIENT L-SHAPED DESIGN - Allan wrench sets long/short arm design for longer reach in deeper work situations on the long end and strengthened leverage for tighter fasteners in narrower space on the short end STAY ORGANIZED - Hex wrench set equipped with a sturdy hinged case with customized position and obvious size identifications are marked , which can store and protect your wrenches better MORE SIZE COVERAGE - Includes 9 metric sizes (1.5–10 mm) to meet a wide range of needs. Designed for easy use in confined spaces with reduced risk of stripping. Portable Allen wrench set, perfect for both home and outdoor applications HAUTMEC Metric Allen Wrenches Sets, 9PCS L Shape Hex Key Set, CR-V Steel Allen Key Set, 1.5-10mm, Precise and Chamfered Tips, HT0221-SS