High-quality chrome vanadium steel forging, hardness up to HRC55, overall heat treatment, high hardness, large torque, good toughness, strong and durable.Multifunctional design, multiple models, equivalent to buying one = buying eight, various maintenance, not afraid of no tools. Key ring design, carrying around the waist, small, convenient and practical.The surface of the wrench is electroplated, which is beautiful and not easy to rust. The handle is blue anodized to prolong the service life of the product.Delicate workmanship quality, split design, each can be opened separately, you can adjust the tightness of the wrench body.Simple appearance / double hump + middle groove design, scientific storage groove, simple and delicate appearance, the thumb can be placed in the middle groove reasonably during use, and the operation is convenient.Size: 81*41mmcolor: blueContents of delivery: 1 set, portable Allen key