27024 Features: -Four jaw chuck.-Used to clamp asymmetrical pieces such as rectangles.-Jaws clamp from 0 to 1.75" inside and 0.54" to 2.62" outside.-Screws on directly to headstock spindle of Micro Woodturning Lathe DB 250. Dimensions: -Overall dimensions: 1.81" H x 3.93" W x 3.42" D, 0.2 lbs.