The H.30 general-purpose hand piece is equipped with a #0 geared 3-jaw chuck, capable of accommodating any shank or drill bit up to 5/32 inches (4mm) in diameter. It includes the HPCK-0 chuck key, which features a molded plastic handle for easy accessory changes. The hand piece is designed with pre-lubricated, shielded ball bearings that do not require additional lubrication. Measuring 5-3/16 inches in length and 1 inches in diameter, it weighs 5.85 oz, with a shipping weight of 9.1 oz. This precision-engineered hand piece is widely used by jewelers and is versatile enough for various applications involving a flex shaft motor. Whether you are engaged in jewelry making, wood carving or other fabrication tasks, Foredom's attachments enhance the functionality of this already exceptional hand piece. Replacement chuck keys are available in the related products section. The handpiece is equipped with advanced pre-lubricated ball bearings, ensuring optimal performance and longevity through reduced friction and enhanced rotational efficiency Includes HPCK-0 chuck key