The Makita 199139-5 Quick Change Drill Chuck transforms your SDS-Plus rotary hammer into a versatile tool with a 1/2" keyless chuck, enabling the use of standard drill bits for a variety of applications. Designed for convenience and efficiency, this durable chuck ensures fast and secure bit changes without the need for additional tools. Its robust construction guarantees reliable performance, even in demanding work environments. Features and Benefits • Converts SDS-Plus Rotary Hammer into a 1/2" Keyless Chuck • Designed to accept up to 1/2" round and hex shank bits • For converting an SDS-Plus Rotary Hammer into a driver drill • Steel construction for increased durability