1/2 inch Heavy Duty Magnetic Drill Chuck. The chuck capacity from 1/32 inch to 1/2 inch (1 mm to 13 mm). Drill chuck with chuck key and a 3/4 inch shank adapter, the chuck can only be compatible with 3/4 inch shank drill end. Comes with chuck key and adapter. 3/4 inch wide x 2 11/64 inch long. Color: as shown Material: steel Package Contents: 2 * Drill Chuck Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.