【Multiple Specifications Allen Key Set】The hex key set provides 30 commonly used sizes with metric (0.7, 0.9, 1.3, 1.5, 2, 2.5 3, 4, 4.5, 5, 5.5, 6, 7, 8 and 10 mm) and imperial (0.028", 0.035", 1/2", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16" and 3/8"), will meet most needs. 【Sturdy and Durable】 These hex keys are made of high quality carbon steel with heat treatment and hardening, very sturdy and wear-resistant, provide a long service life. 【Precise and Easy to Use】 The precisely machined tips fit tightly into the fasteners, sliding easily into the fasteners, reducing wear on the Allen key and damage to the fastener head. Long arm design, full use of leverage for easy operation. 【Wide Applications】 Allen keys are necessary tools for any amateur or professional DIY enthusiast. They are perfect for working on bicycles, furniture, motorcycles, vehicles and more DIY and repair work. 【Portable】 Comes with a case, neat and organized, convenient to store and