Lasergrip LG-105 fits Smith & Wesson J Frame round butt revolvers. Choose from black or pink Lasergrip made of a hard polymer to be both rugged and well suited for personal defense. The smooth material also provides for snag-free draws and is hard enough to meet strict standards for durability and reliability. Laser operates using front placement instinctive activation and has user-adjustable windage and elevation. Two batteries provide more than four hours of on time use. Lasergrip LG-105 fits the following round butt models: Airlite/Airweight/Bodyguard/Chief's Special/Centennial/Ladysmith/models 36/37/38/49/60/63/317/331/332/337/340/342/351/360/442/637/638/640/642/649/651 and 940.