The Jacobs Jcm6279 Super Chucks (R) Keyed Drill Chuck has a 1/2" cap size and a 33JT mount size, made of steel with dimensions of 2.4" depth, 3.0" length, and 2.4" width. This drill chuck features a Jacobs Taper and a maximum drill capacity, designed for machining and metalworking applications. The product does not come with a battery included and weighs 1.1 lbs, suitable for various industrial uses. The California Prop 65 Warning is not applicable to this product.