Made of Carbon Steel material with black coated.A chuck require a key to provide the necessary torque to tighten and loosen the jaws.Allows you to keep your drill bits firmly in place for difficult jobs.Great for replacing lost or worn out drill chuck keys. Specifications:Color: BlackMaterial: Carbon SteelSurface Treatment: BlackGear Teeth Quantity: 11Pi-lot Diameter: 5mm / 0.19 inchGear Diameter: 15mm / 0.59 inchTotal Size: 57 x 34mm / 2.24 inch x 1.38 inch(L*W) Package Content:1 x Chuck Key.
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