Hegebeck 24.9mm gear diameter Chuck Key Description 1.Designed to fit most of popular drill chucks ,the small key allows for easy storage and use.2.Used for controlling tightness of looseness of electric drill clamping tool , can be used in hammer or drilling mode,comfortable to grip,Convenient and Compact3.Made from solid carbon steel with high strength, not easy to break. Coated with durable plastic ,which is anti-rust, anti-slip design,reducing stress damage within a certain limit4.Great for home improvement needs,do yourselves projects and big construction projects.Great to be used with Hammer Drills when a tight fit is required5.Package Content: 1 x Chuck KeySpecifications:Color: Yellow,BlackMaterial: Carbon Steel,PlasticSurface Treatment: Plastic CoatedGear Quantity: 11Pilot Diameter: 8.9mm/0.35 InchGear Diameter: 24.9mm/0.98 InchPackage Content:2 x Chuck KeyNote:1. A chuck require a key to provide the necessary torque to tighten and loosen the jaws.2. package contain the key but not includes a chuck.3. Please check the size and style you need carefully before buying.